 After his death the Architectural Exhibition Society gave over part of its annual show to an exhibition of 339 of his watercolours, and then they disappeared.Petit left one thousand of his drawings to different family members, now quite widely dispersed, and the rest, the bulk, passed down one family line until 1957 when they were abandoned to new owners after a death.The collection, already depleted by damage, was then disposed of through Abbott and Holder and Sotheby's Billingshurst in the 1980s and 1990s, indiscriminately.