Two thin notebooks about 'An Ornithological Transect of the North Atlantic', with B.D. Nicholson, British Birds, Vol.24, No.10, Mar 1931. The paper was the result of three crossings between London and Georgetown made by Nicholson and Basil Nicholson as they returned separately from British Guiana. The paper is in the form of a reprint in a thin notebook.

The second excerise notebook contains a 28 page manuscript draft, in Basil Nicholson's hand, of part of the paper (a list of contents on the cover is misleading: the draft and and a very brief note on the last page comprise all of the used pages).