Manager of Wilfrid Voynich's London shop. Author of several writings - details of which can be found [1] (under Printed Books and Articles), including "The Mystery of the Roger Bacon Cipher MS." (Bookman's Journal and Print Collector 5, (October 1921), pp.11-16.] and "Notes on the Firm of W. M. Voynich." Library World. 34 (April 1932) pp.225-8.

A mention here [2].

Not to be confused with Major Herbert Garland 1880-1921, associate of TE Lawrence (Wikipedia page [3]), a brief biography of whom can be found here [4].