Major donated some unique art objects to the different museums of U.K. including the famous Gayer-Anderson Cat which is now kept at display in British Museum. He also donated several art objects to the different museums of U.K., Sweden, Greece and America. He collected more than 12000 art objects from Middle East and Southeast Asia.

The largest part of this collection is preserved in Fitzwilliam museum Cambridge. Major died in 1945 in Lavenham and after his death his brother Colonel T.G. Gayer-Anderson started the work of making correspondence with the different provincial museums of U.K. and the other museums out of Britain for donating the art objects collected by the twins.

In 1952, he donated his collection of Indian miniature paintings and drawings to the Victoria and Albert Museum London.

In 1954, he donated 220 Indian miniature paintings and drawings to the Commonwealth of Australia in the memory of his two Australian friends. This collection was unique in several respects. It was first kept in the National Library of Australia and later transferred to the National Gallery of Australia, Canberra.

He donated the larger part of the collection of Indian paintings and drawings to V&A London. This collection has 409 Indian paintings and drawings. He also donated the other art objects to V&A and the other associated museums.

All these art objects including the Indian paintings and drawings, which were donated by the twins to the different museums and libraries of U.K. and abroad, are known as the art objects of Gayer-Anderson collection.