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