MSS.3259-3285 comprise chiefly scientific material; they include student notebooks on zoology, botany and geology (MSS.3259-3280); scientific logs from the British Antarctic Expedition (MSS.3281-3283), specifically a biological log (MSS.3281-3282) and a log of whales sighted (MS.3283), both spanning 1910-1913; an address delivered in 1913 to the New Zealand branch of the British Medical Association on Mendel's principle of heredity (MS.3284); and some notes on fish and fishing (MS.3285). MSS.5252-5254 comprise more personal and more miscellaneous material. MS.5252 is a scrapbook kept by Lillie, containing news cuttings, photographs and miscellaneous papers, spanning the period c.1845-1910 and including cuttings (with portrait prints) on science and scientists, 1845-1901; caricatures by Lillie of lecturers and staff at Birmingham University, 1904-1905; geological photographs, 1907-1909; family photographs (including a group class portrait at United Services' College, Westward Ho!, c.1892); and ephemera from Cambridge, 1909-1910. MS.5253 comprises cuttings from newspapers and illustrated magazines, spanning 1910-1914 and mainly relating to Robert Falcon Scott's British Antarctic Expedition. Finally MS.5254 comprises correspondence and very miscellaneous papers from the period 1824-1938 (plus some undated material) among them letters to his grandfather John Lillie D.D. (1806-1866), and to his maternal relatives the Macaire family, and letters to Lillie from E.A.N. Arber, Caroline Oates and others.

The collection centres on Wallich's work on biology, particularly marine biology, and his belief that other figures in the field were ignoring or plagiarising his discoveries. As well as his notes, it includes a collection of offprints by Wallich (MS.4969) and a collection of offprints by other scientists, with Wallich's comments (MS.4970).

Papers of the Department of Zoology comprising: DF200 Keeper of Zoology's correspondence and files;
DF201 Keeper of Zoology's out-letters;
DF202 Department of Zoology: Keeper's miscellaneous documents;
DF203 Keeper of Zoology's wartime papers and memoranda;
DF204 Registers and indexes of Zoology departmental correspondence;
DF205 Zoology Reports to Trustees and other official documents;
DF206 Keeper of Zoology's subject files;
DF207 Zoology Departmental finance and accounts;
DF208 Keeper of Zoology's staff files and official diaries;
DF209 Zoology reports of progress, monthly and annual;
DF210 Keeper of Zoology's building and accommodation files;
DF211 Keeper of Zoology's publication files;
DF212 Keeper of Zoology's confidential files;
DF213 Keeper of Zoology's expedition files;
DF214 Keeper of Zoology's Great Barrier Reef Expedition files;
DF215 Keeper of Zoology's John Murray Expeditions files;
DF216 Zoology Acquisition, loan and exchange records;
DF217 Artwork for publication;
DF218 Zoology Accessions Registers;
DF219 Collection Catalogues;
DF220 Zoology Departmental Visitors Books;
DF230 Bird Section correspondence;
DF231 Vertebrate Section reports to Trustees and other official documents;
DF232 Mammal Section correspondence;
DF233 Fish Section correspondence;
DF234 Osteology Section subject files;
DF235 Reptile Section correspondence;
DF250 Invertebrate Section correspondence and papers;
DF251 Invertebrate Section reports to Trustees and other official documents;
DF252 Crustacea Section correspondence;
DF253 Coelenterata Section correspondence;
DF254 Mollusca Section correspondence;
DF255 Arachnida Section correspondence;
DF256 Crustacea Section research papers;
DF257 Coelenterata Section research papers;
DF258 Coelenterata Section collection records;
DF259 Parasitic Worms Section correspondence;
DF260 Sponge Section correspondence;
DF261 Bryozoa Section correspondence;
DF262 Invertebrate sections visitors books;
DF263 Sponge Section, photographs and artwork for publication;
DF264 Echinodermata and Protochordata Section correspondence;
DF265 Annelida Section Correspondence and Papers;
DF266 Echinodermata and Protochordata Section research papers;
DF270 Zoology Library accession records;
DF271 Zoology Library correspondence and memoranda;
DF272 Zoology Library catalogues and related material.

Papers relating to Petrus Camper, 1805-[1800s], comprising 2 volumes of manuscript translations of works by Petrus Camper, mostly by unknown translators but including Sir Richard Owen. Containing treatises on the organs of hearing of various fish and a whale, 1805; and a treatise on the Orangutan, [1800s].

Correspondence, 1887-1925, mainly between Dendy and fellow academics relating to the morphology and classification of sponges, notably with George Parker Bidder, President of the Marine Biological Association of the UK; Professor William John Dakin, Professor of Zoology, University of Liverpool; Francisco Ferrer Hernandez, Musea de Gencias Naturales, Madrid, Spain; Professor William A Haswell, Emeritus Professor of Biology, University of Sydney, Australia; Ernst Hentschel, Zoologisches Museum, Hamburg, Germany; William Abbott Herdman, University of Liverpool; Professor Sydney John Hickson, Emeritus Professor of Zoology, University of Liverpool; Randolph Kirkpartick, Natural History Museum, London; Professor James Herbert Orton, Emeritus Professor of Zoology, University of Liverpool; Joseph Pearson, Director of the Columbo Museum, Ceylon; and Edgar Thurston, Superintendent of the Government Museum, Madras, India. The correspondence also includes letters, 1919-1921, relating to the establishment of a research grant in memory of Harold Row, Dendy's assistant. Papers, 1886-1899, relating to sponge collections, particularly specimens in Australia and New Zealand, and including the dredging records for Port Phillip, Victoria, Australia, 1887-1890. Lecture notes written by Dendy, [1903-1925], including handwritten texts of lectures on 'Echinodermata', 'The development of starfish', 'Holothurioidea', 'Class Gastropoda', 'Mytilus', 'Anodarta cygnea', 'Helix', 'Mollusca', and 'Merozoa', and typescript texts of public lectures including 'The stream of life', given at a Citizens' Lecture in Edinburgh, 1921, and 'The evolution theory today', given at the Liverpool Meeting of the British Association for the Advancement of Science, 1923. Working notebooks, [1886]-1912, mainly containing scientific experiments and observations relating to sponges, notably the Challenger Amphipoda and the Grantia Compressa, and notes on the topographical distribution of, and biographical references to, sponge specimens. Two notebooks, 1917-1919, recording experiments and observations during Dendy's membership of the Royal Society's Committee for the Investigation of Grain Pests. Papers, 1892, relating to The Victorian land planarians [1894] by Dendy, comprising a volume of annotated and revised extracts from that work, and a letter to Dendy from Thomas Steel concerning flatworm species. Printed obituaries of Dendy, 1925-1926. Papers relating to the study of lizard-like reptiles commonly known as Tuatara (the scientific name being Sphenodon), [1897]-1910, including correspondence, 1908-1910, between Dendy and Edward Bles, Elliot Smith, Annie Howes and [William Thompson] Sedgwick, and catalogues, notes and photographs of Tuatara embryos.

Papers of Professor Humphrey Robert Hewer, 1918-1974, comprising biographical papers, 1918-1974, including diaries, photographs; notebooks, journals and working papers, 1929-1973, relating to field trips, his work on seals, zygaena and woodpeckers; papers and correspondence of various natural history committees and societies on which he served, 1967-1974; drafts and material relating to Hewer's publications (especially British seals), 1926-1972; photographs, drawings, notes, and scripts for various wildlife films, 1951-1974; correspondence;
notebooks on zoology, cytology, made whilst a student at the Royal College of Science (Imperial College), [1920-1926].

Scientific papers of T H Huxley, 1846-1898, comprising notebooks made whilst Assistant Surgeon to HMS RATTLESNAKE, 1846-1850, containing his observations, sketches of specimens, notably oceanic hydrozoa, mollusca and crustacea, related notes;

scientific notebooks, papers and correspondence, [1855-1888], relating to botany and principally zoology, bound in volumes largely according to zoological classification, including invertebrata, crustacea, vertebrata, teleostei, amphibia, reptilia, aves, mammalia, carnivora, primates, anthropology, mycological, bacteria, hirudinea, mollusca, petromyzon, ganoidei, sturiones, dipnoi, teleostei, salmonidae, insectivora, rodentia, lepus, canidae, fossil fishes, dinosauria, ethnology, origins of biology, gentiana; correspondence concerning deep sea soundings, 1857; syllabus and notes for lectures, [1860-1886], for the Government (later Royal) School of Mines, Royal Institution, working men, London Institution, University of Edinburgh, notably on natural history, zoology, ethnology, elementary geography, physiography; correspondence, 1851-1894; notebooks, [1847-1884], concerning visits to Switzerland, Tenby, Italy, notes on anatomy and vertebrae;

drawings, [1847-1895] many illustrating laboratory work, and relating to observations in his notebooks, relating to protozoa and botany; coelenterata, brachiostomata, echinodermata, mollusca; vermes and arthropoda with peripatus; pisces with tunicata and amphioxus; mammalia; anthropological photographs, [1868-1898].