US only?
Library of Congress (LCCN, below) reports "New York and London, Macmillan and co., 1893".
This title is not found 2019-09-16 in automated search of 1893 UK newspapers and magazines, nor in WorldCat records as London first-listed, nor in British Library records as 1893.
Published as one volume in:
"A New Uniform Edition of Mrs. Molesworth's Stories for Children, in Ten Volumes. Printed from new plates, uniformly bound, with numerous illustrations. 12mo, cloth, gilt, per volume, $1.00."
"The ten volumes in box, $10.00."
--"Macmillan & Co.'s List of New Books published in November", The Literary World: A Monthly ... v24 #23 1893-11-18 (issue number and date suggest semi-monthly)
"Each story has separate t.p. and paging." --WorldCat record OCLC 1563823
Walter Crane illustrated the first editions of both novels, as well as this omnibus. This record presumes that the illustrations in this volume reproductions of the original ones, or a selection therefrom.