He then curated for the wealthy amateur butterfly collector Herbert Adams, followed by the insect dealer William Frederick Henry Rosenberg.

During the First World War he worked with Arthur Bacot at the Lister Institute on trench fever and typhus diseases carried by lice.

[6] From 1915, he was head curator of the large and increasing collection of amateur lepidopterist James John Joicey at the Hill Museum in Witley, Surrey.

[16] He wrote about 150 papers, many of them generic revisions in the Bulletin of the Hill Museum (1921–1932)[1][2][3][4] (which he also co-edited with Joicey) and in the series entitled The Fauna of British India, Including Ceylon and Burma.

His best known works are his monograph on Delias (a revision of the whole genus) and the three Pieridae volumes of Lepidopterorum Catalogus published by Wilhelm Junk.