Guess: Might match authorized Library of Congress name "Reynolds, Baillie, Mrs."
Items with "Robins, G. M." as Credited Author
The Bertha Clay Library
208. Keep My SecretThe Century Series
19. The Ides of MarchElectric Series
394. Keep My SecretThe Keystone Library
482. Keep My SecretLippincott's Series of Select Novels
219. Nigel FerrardLovell's Household Library
262. The Tree of KnowledgeLovell's International Series
36. The Tree of Knowledge193. The Ides of March
Munro's Library (Pocket)
616. Keep My SecretSeaside Library, Pocket Edition
1731. The Tree of Knowledge1929. Keep My Secret