He is credited with introducing the Burmese Cassia renigera, the Pterocarpus indicus, and the South American Gliricidia maculata to the city of Bombay.
Ethelbert Blatter, SJ, Principal and Professor of Botany at St Xavier's College, Bombay, wrote the series Palms of India for the Journal.
A few years later Blatter and Millard coauthored the series Some Beautiful Indian Trees, resulting in a book of the same name, which has since become a classic, and remains in print.
Calling an urgent meeting of the Society, Millard helped build consensus for both employing Crump and launching a fund drive for a mammal survey.
Lasting 12 years, the survey helped build collections that became the basis for R.I. Pocock's two volumes, Mammalia, in the series The Fauna of British India, Including Ceylon and Burma.