Boys Cinema ran every week from Dec 1919 (n1) to May 1940 (n1063). Houdini appeared in 1920, 1921, 1922, and 1923 issues:

1. Jan 17, 1920. v1 n6. “Houdini the Handcuff King”  cover & p26.  (HHCE Collection)
2. Feb 21, 1920. v1 n11. “Houdini”  p12+.  (HHCE Collection)
3. Jan 8, 1921. v3 n57. photo  p5. (HHCE Collection)
4. Feb 5, 1921. v3 n61. photo p26. (HHCE Collection)
5. Feb 19, 1921. v3 n63. photo  p5. (HHCE Collection)
6. May 7, 1921. v3 n74. “The Grim Game”  p14. (HHCE Collection)
7. May 14, 1921. v3 n75. “Terror Island”  cover & p2+.  (HHCE Collection)
8. June 25, 1921. v4 n81. “The Grim Game”  p14+. (HHCE Collection)
9. July 30, 1921. v4 n86.  “The Marvelous Houdini” (photo feature)  p14+.  (HHCE Collection)
10. March 4, 1922. v5 n117. Houdini card on cover.  (HHCE Collection)
11. March 25, 1922. v5 n120. Houdini cover with Famous Heroes Card # 4 insert. (Arthur Moses Collection)
12. Jan 13, 1923. v6 n162. “Houdini In The Man From Beyond”  p14+.  (Arthur Moses Collection)

This week I share Houdini’s appearance on the cover of Boys Cinema March 25, 1922. v5 n120 from the mighty Arthur Moses collection.

The set of 24 Famous Heroes cards came out in the Weekly Boys Cinema Magazine, with the first card (No. 1) being inserted in the Boys Cinema Issue No. 117, Vol. 5 March 4, 1922.

Each week, they issued another card. The Harry Houdini card (No. 4) came out in Boys Cinema issue No. 120, Vol 5 March 25, 1922.

And the card is available on eBay from time to time, but the magazine is extremely hard to find. So it appears more cards have survived than the magazine the card was inserted in.  Thank You Arthur!