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The collection of 153 volumes of sailing and fighting instructions include the majority of those listed in Sir Julian Corbett, Signals and instructions (Navy Records Society, 1908). In addition, there are many examples of those issued to smaller squadrons rather than fleets. The earliest is a printed copy of 1673 issued to James Duke of York (1633-1701). There is a copy of 1691 by Admiral Russel (1653-1727), issued in 1702. Subsequent sets show the development which took place up to the Seven Years War. From 1756 onwards additional and supplementary instructions became more numerous. The collection also contains several versions of instructions for ships in convoy, 1708 to 1815. In addition to these single items, there are sets in the personal collections. The most extensive, of thirty-four volumes, is that of Admiral Duncan, 1760 to 1799, including signals and instructions issued during the American War, convoy instructions for 1782 and a number of sets from the 1790s. Other sets of significance include those of Vice-Admiral Duff, 1748 to 1762, including convoy instructions, 1756 and 1758, and printed instructions for disembarking and re-embarking troops, which were issued by Admiral Rodney (1719-1792) for the landings at Marinique, 1762; of Rear-Admiral Clements, 1758 to 1770; and of Captain Lord Longford, 1779 to 1780.

This class consists of 120 printed and manuscript signal books and signal logs. 1711 to 1816. The earliest signal book is a manuscript volume compiled between 1710 and 1711. This contains additional signals made by Sir John Norris (c 1670-1749) in the RANELAGH. The format of this volume is very similar to the printed signal book of 1714 by Jonathan Greenwood. There are some manuscript examples produced privately by individual officers usually with a thumb index for quick reference, dating from the mid-eighteenth century. There are also printed signal books for 1790, 1793, 1795, 1798 and The General Signal Book of 1799, 1808 and 1816. During the 1790s the printing of signal books became general practice. There are various examples (which include day and fog signals), night signals, instructions and additional instructions, which were usually issued in sets. For example, the collection has a set issued in 1793 by Admiral Lord Hood to the Mediterranean fleet. There is a similar set issued by Sir John Jervis in 1794 while in the West Indies.

Most of the printed books which were issued have additional signals inserted in manuscript. The manuscript signal books are copies kept by officers who were not issued with a printed signal book, and preferred their own copy for easy reference; they are therefore usually pocket size. This practice was forbidden because of the danger of the code falling into enemy hands. However, there are a number of these in the collection and they often contain additional information, such as orders of battle and sailing, keys to both the British and French systems of coastal signals, pendant lists, etc. Many are finely executed and some are illustrated. There is a manuscript signal book used at the battle of the Nile, based on the 1795 edition entitled 'Day and Night Signal Book, Horarry, Fog etc.' by Midshipman (later Commander) Charles Claridge (fl 1798-1823) in the DEFENCE. This has a short diary at the back of the volume describing the battle and an order of battle and an order of battle and sailing. A manuscript copy of Lord Howe's code of 1793 is also included; this contains a list of signals for identifying coasts and headlands, caricatures, a sea song and drawings of naval vessels. The collection contains a group of signal books issued for use in a particular area; they include volumes for Barbados, 1820, Plymouth, 1797 and St Helena, 1817. There are also three signal logs, one of which was kept in the VICTORY, 1804.

Signals: Theory. Included in this small group of documents are a description of Colonel Pasley's telegraph of 1804 and 'Observations on Signal Shapes as applied to the character of Signals Flags', 1818, by Captain Thomas Shortland (1771-1827).