1924:

Vol. 39, No. 5 till Vol. 40, No. 1: The Man in the Brown Suit [JR]

1927:

Vol. 44, No. 5: The Unexpected Guest [HP + KAH + JJ]

Vol. 44, No. 6: The Dartmoor Adventure [HP + KAH + JJ]

Vol. 45, No. 1: The Lady on the Stairs [HP + KAH + JJ]

Vol. 45, No. 2: The Radium Thieves [HP + KAH + JJ]

Vol. 45, No. 3: In the House of the Enemy [HP + KAH + JJ]

Vol. 45, No. 4: The Yellow Jasmine Mystery [HP + KAH + JJ]

Vol. 45, No. 5: The Chess Problem [HP + KAH + JJ]

Vol. 45, No. 6: The Baited Trap [HP + KAH + JJ]

Vol. 46, No. 1: The Peroxide Blonde [HP + KAH + JJ]

Vol. 46, No. 2: The Enemy Strikes [HP + KAH + JJ]

1928:

Vol. 46, No. 3: The Crag in the Dolomites [HP + KAH + JJ]