This info comes from the following book (unfortunately the only one we have on Belloc), but when I have a chance I'll check the local university library to see if there is more info in other biographies of Belloc.
Title: Hilaire Belloc /
Author(s): Wilson, A. N., 1950-
Publication: New York : Atheneum,
Edition: 1st American ed.
Description: x, 398 p.,  p. of plates : ill. ; 25 cm.
Standard No: ISBN: 0689114400