I would recommend trying either silverfast or colourfast plugins rather than doing the
inversion in photoshop.
With colour negatives these tools are pretty much required for getting good results,
with B&W they just make good results much easier.
The problem, simply put, is that the inversion required is 1/x rather than 1-x and if you use 1-x
(like photoshop) the tonality curve will be wrong and fixing will need quite a bit of fiddling
with curves or, less accurately, exposure, shadow, and highlight controls.
I have no interest with these firms but have worked in movie restoration for many years.
Finally, I really like your image of the child in the graveyard.
-Steve