A painting of the Cow Tower by J. Thirtle, around 1812. (© NCC)
Drawing, 'The Boatyard, near The Cow Tower, Norwich' by John Thirtle (1777-1839).
Pencil and watercolour (slight scraping out) on paper, about 1812.
Inscription in brown paint lower centre boathouse door 'IT'
44.5 cm x 65.4 cm
Norwich Castle Study Centre
Norwich, The Cow Tower, NHER 632