Lady Molly of Scotland Yard is written from the painfully worshipful view of her, clerk?, upper servant?, who takes her as a champion of feminine intuition and guile in the plodding world of Scotland Yard. The first few stories are mildly interesting bits of Edwardian life, especially feminine life; I noted one illegitimate child put to be raised by a village woman, with the mother certainly thought less of but not scorned or ostracized in the village; and another young woman of good family who fenced and boxed.
They didn't do much for me as mysteries -- if there were clues, they were social enough that I missed most of them; Lady Molly is supposed to be 'condensing fact from the vapors of nuance', as another writer had it, and I miss nuance from a culture even as little different as that. The only really interesting mystery is of Lady Molly's origins; I can *imagine* that over the course of the whole, the worshiping servant discovers them -- perhaps accidentally -- perhaps disillusioned -- perhaps more worshipful yet -- ... But I only imagine, because I didn't finish.
Max Carrados has an equally improbably competent sleuth, this one blind and rich, with a rather stupider professional inquiry agent as the narrator and foil. The puzzles are more material, and hold up to changing time a little better, and I think there are more clues for the reader.
From the U. Penn. Celebration of Women Writers: Lady Molly of Scotland Yard,
Project Gutenberg etext #12932: Max Carrados,
So wrote clew in Fiction (20th c.). , Mystery.