Pour que papa vienne en permission, s'il vous plait

A young girl in a Red Cross nurse's uniform and a small boy wearing a red cap, carrying a collection cup and selling medals, respectively.
Translation of title: So that papa may come home on leave, please.
Signed: Poulbot.
Without text, signed in pencil.
Another edition: POS - Fr .P68, no. 10. Also see POS - Fr .P68, no. 8 (same image with different text).
Promotional goal: Fr. H59. 1915.
Item is no. 128 in a printed checklist available in the Library of Congress Prints and Photographs Reading Room.
ADE