The Voice in Ace G-Man by Edward S. Williams (Popular)
1.	V7	#4	Nov. 1940	Death’s Diplomatic Service
2.	V8	#1	Jan. 1941	Honor of the Stainless Shield
3.	V8	#2	Mar. 1941	Three Miles From Hell
4.	V8	#3	May 1941	Spy-Maker’s Factory
5.	V9	#1	Dec. 1941	The Other Voice
6.	V9	#2	Feb. 1942	Journey to Hell
7.	V9	#4	June 1942	The Voice Says Die!
8.	V10	#1	Aug. 1942	Transport to Hell
9.	V10	#2	Oct. 1942	Some Must be Sacrificed
10.	V10	#3	Dec. 1942	The House of Hidden Death
11.	V11	#1	Apr. 1943	The Voice—and the Stolen Earth

The Vulture in Excitement by Harold Ward (Street & Smith)
1.	V22	#2	Apr. 1931	The Vulture