2. Who Is the Skull? © 20Jul40; LP9828.
3. Pirates of the Plains. © 27Jul40; LP9803.
4. The Skull Baits a Trap. © 3Aug40; LP9830.
5. Win, Lose, or Draw. © 10Aug40; LP9843.
6. Buried Alive. © 17Aug40; LP9847.
7. The Chariot of Doom. © 24Aug40; LP9857.
8. The Secret of Number Ten. © 26Aug40; LP9865.
9. The Fatal Warning. © 7Sep40; LP9898.
10. Framed for Murder. © 14Sep40; LP9913.
11. The Bucket of Death. © 21Sep40; LP9925.