HAROLD'S CIRCUS An Astounding, Colossal, Purple Crayon Event! by Crockett Johnson was published 1959 in NY by Harper & Bros, 1st edition measuring 6" x 4 3/4" with pictorial cover and matching dustjacket, one-color drawings by the author.
This is likely the 1st printing with $1.50 dustjacket price, No. 8584A at bottom of inside dj flap and No. 8585A at bottom inside rear dj flap, dj rear and inside rear flap advertise a total of 8 Crockett Johnson titles published before 1959.