We’ve had a good look, there are no more photos in Mum’s collection to be scanned. So her 1st gen iPad has had 1266 photos added to its Photos app. Being an original it still has the Picture Frame capability, it’s set to start a random slideshow (10 seconds per pic) with the tap of a single icon on the lockscreen.
In scanning the last batch of photos I found a telegram sent the morning after I was born from an aunt to Mum.