Guess: Might match authorized Library of Congress name "Walworth, Mansfield Tracy, 1830-1873".
Items with "Walworth, Mansfield Tracey" as Credited Author
Clover Series
64. Married in MaskEagle Library
289. Married in MaskFar and Near Series
35. Married in MaskIdeal Series of American Copyright Novels
8. Married in MaskMadison Square Series
Stormcliff. A Tale of the Highlands10. Warwick
12. Hotspur
27. Lulu. A Tale of the National Hotel Poisoning
39. Delaplaine; or, The Sacrifice of Irene
56. Zahara