While we await further info regarding the Hugo Fregonese retrospective and the status of the print used to screen BLACK TUESDAY, here are two useful and informative blog entries from a key figure in film history and restoration (and a prime mover at the just-completed Cinema Ritrovato in Bologna), Ehsan Khoshbakht--both covering little-known information related to THIS GUN FOR HIRE:

https://notesoncinematograph.blogspot.com/2020/06/this-gun-for-hire.html#more

https://notesoncinematograph.blogspot.com/2020/04/Maltz.html

Clicking on the #franktuttle hashtag associated with these entries will bring up more material available at the NOTES ON CINEMATOGRAPH blog about Tuttle's career, which extends back into the silent era.