Notes:
Letter column in Secrets of Sinister House (DC, 1972 series) #13 credits Jack Sparling with cover, but suspicions that is an error (Sparling drew the previous cover) and the art is by Alcala, whose art is stylistically quite different than Sparling's.
Notes:
Credits from Showcase Presents: Secrets of Sinister House (DC, 2010 series) #[nn]. Adams inks, with an assist by Buckler, confirmed on the Neal Adams Checklist.