Just got some new pictures back and I think this is the best of the lot.
Taken with the old Foldex pinholer on Fuji Velvia 100. I’m going to try negative film and see if that helps at all: the exposure latitude of slide film is perhaps not the best solution for pinhole experiments.
Flickr images of the rest of them are available. I am over the limit for my free sets and am not sure about the $25 for a Pro account. If you feel generous . . .