The Workbasket was a mailorder magazine that began publication in 1935. It was filled with project ideas, lace and needlework patterns, and iron-on embroidery transfers.
Unfortunately the embroidery transfer sheets don't say "Workbasket" on them anywhere! But they're usually very large, red-lined sheets with many different project ideas and stitching directions. Also most are numbered, somewhere on the page, with these numbers or these numbers.
More about the Workbasket: