This is Thrilling Mystery for January 1936, no cover artist recorded and no ISFDB entry. The rarity of this cover is that it presents its “heroine” not as being menaced or in peril but actually dead by the time the action depicted on the cover is occurring. I found this cover at Pulp Covers and verified its date in the Galactic Central index.
This is Thrilling Mystery for October 1935, no recorded artist or ISFDB entry. I found this cover at Pulp Covers and verified the date at the Galactic Central index.
This March 1940 cover of Thrilling Mystery by Rudolph Berlarski is about as mad science as it gets. The ISFDB entry for this issue is here. I found this version of the cover at Pulp Covers.
This is Thrilling Mystery for November 1938, cover artist unrecorded. The ISFDB entry for this issue is here. I found this cover at Pulp Covers.
This is Thrilling Mystery for November 1937, cover artist unrecorded. The ISFDB entry for this issue is here. I found this version of the cover at Pulp Covers.
This is Thrilling Mystery for April 1937, cover by Rudolph Berlarski. The ISFDB entry for this issue is here. Unfortunately this small image preserved at Galactic Central is the only version of the cover I could find.
This is Thrilling Mystery for October 1936, cover artist unrecorded. The ISFDB entry for this issue is here. The version of the cover above was found in this post at Pulp Covers. The version preserved at Galactic Central is much smaller but has sharper color.
This is Thrilling Mystery for September 1936, cover by Rudolph Berlarski. The ISFDB entry for this issue is here. The version of the cover above (very large is you click through) was found in this post at Pulp Covers. It looks to my eye like the scan was of an issue that might have suffered some wrinkling due to humidity (these old magazines are fragile and in my experience can be quite difficult to care for). The version at Galactic Central does not show this damage but is much smaller.
This is Thrilling Mystery for July 1937, cover artist unrecorded by likely Rafael de Soto. The ISFDB entry for this issue is that preserved at Galactic Central.
This is Thrilling Mystery for April 1936, cover artist unrecorded. The ISFDB entry for this issue is here. I found this version of the cover in a post at Davy Crockett’s Almanac.
