Guess: Might match Library of Congress name "Collins, Mabel, 1851-1927".
Items with "Collins, Mabel" as Credited Author
All Star Series
95. Lord Vancourt's daughterAmerican Series
206. The Confessions of a WomanThe Canterbury Series
3. Morial the Mahatma4. Suggestion
Charles Garvice Series
99. Lord Vancourt's DaughterEagle Library
232. A Debt of Honor251. When Love is True
Eden Series
128. The Prettiest Woman in WarsawThe Keystone Library
199. Lord Vancourt's daughter200. The Prettiest Woman in Warsaw
Lakewood Series
12. Morial the MahatmaLovell's International Series
111. The Confessions of a WomanLovell's Occult Series
7. The Idyll of the White LotusLucky Series
14. An Adventure in MoroccoMunro's Library (Pocket)
540. Lord Vanecourt's Daughter623. The Prettiest Woman in Warsaw
New Surprise (Series)
28. A Debt of HonorSeaside Library, Pocket Edition
479. Lord Vancourt's daughter828. The Prettiest Woman in Warsaw
1463. Ida