Final appearance in National Comics. Prop Powers appears next in Atomic Comics (Green Publishing, 1946 Series) #2.
Final appearance of the "Merlin the Magician" feature.
Final Golden Age appearance of the Merlin the Magician character. Appears next in All Star Comics (DC, 1999 Series) #1 (Early May 1999), where he dies.
Lance Blackwood, according to the Who's Who, is a by-line on this strip.
The U.S. general in this story resembles Commissioner Dolan in the Spirit strip.
Last appearance in National Comics. Next seen in Bomber Comics (Elliot, 1944 series) #1. Tracking of feature noted by Leonard Wolinsky via the GCD Errors list, February 2009.