The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Third Series, Vol. 1, Part 2, Nos. 1&2, Periodicals, 1946-1947.
The Phantom Falcon [Clipper Kirk] (cont'd from story in #68, introduction, origin); K7 (villain, introduction); Anton (villain, introduction, death); other enemy agents (villain, introduction)