An interesting challenge from my sister, researching family history. She took the photograph 14 which I have tried to enhance.
14b I have changed the perspective in Hugin.
14c I tried wavelet decompose and found the best result was when I switched off visibility of Wavelet residual. I then flattened visible and merged it with an unmodified version using Hard light.
(All these photographs I have reduced in size before uploading.)

I am sure someone will suggest a better way of doing this!

david.