The willow in front of the house is there in some exterior shots and absent in others. According to the director they lost a reel and had to re-shoot material several months later. Meanwhile the tree had been felled.
Dr. Munoz refers to Randolph Carter as a "young Hemingway". The story is set in 1925, and Hemingway did not attract public attention until he published his first novel ("The Sun Also Rises") in 1926.