WINTER,MILO. BILLY POPGUN. Boston: Houghton Mifflin 1912 (Oct 1912). 4to (8 x 10 3/4"), cloth backed boards, pictorial paste-on, slight soil and wear to cover, VG+. First edition of Winter's best and scarcest book. Written by him and illustrated by him as well featuring pictorial endpapers, 8 fabulous color plates, plus line illustrations in-text. A fantasy trip taken by little Billy (who had a pop-gun).