W. Bert Foster
Foster, Walter Bertram
November 3, 1869 – April 26, 1929 (aged 59)
Birth place: Providence, Rhode Island, USA
Library of Congress (and thus WorldCat) separately catalogs works by Alice B. Emerson, a joint pseudonym with Mildred A. Wirt and Edward Stratemeyer, and by Nicholas Carter, a Street & Smith house name. None of those works is in the database (October 2022).