Various.

Bentley Priory was a freehold estate in Harrow. It was originally owned by an Augustinian house but passed into private hands when the priory was dissolved in 1536. In 1788 the estate was sold to John James Hamilton, the Marquess of Abercorn, who died in 1818. In 1857 the estate was sold to builder and railway engineer Sir John Kelk who sold it in 1882.

Aylwards was a tenement of Great Stanmore Manor which later passed into private hands and thence into the ownership of the Marquess of Abercorn.

Source of information: 'Harrow, including Pinner : Manors', A History of the County of Middlesex: Volume 4: Harmondsworth, Hayes, Norwood with Southall, Hillingdon with Uxbridge, Ickenham, Northolt, Perivale, Ruislip, Edgware, Harrow with Pinner (1971), pp. 203-211 and 'Great Stanmore: Economic history', A History of the County of Middlesex: Volume 5: Hendon, Kingsbury, Great Stanmore, Little Stanmore, Edmonton Enfield, Monken Hadley, South Mimms, Tottenham (1976), pp. 99-102 (available online).