The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Third Series, Vol. 2, Part 2, No. 1, Periodicals, January-June 1948.
Skidsy proposes to Tessie and she says no. Tessie thinks that it would be unfair to marry before Sy and Marian do, as they have been dating longer than Tessie and Skidsy.