These tales appeared in Pearson's Magazine in 1917 and 1918 and were later collected in The Broken Fang and Other Experiences of a Specialist in Spooks (1920).
The stories appeared in Pearson's Magazine between 1917 and 1918. These tales were subsequently collected together in the book "The Broken Fang and Other Experiences of a Specialist in Spooks," published in 1920.