Hi Jen not sure if we could be related or not, I have been researching my family tree and I have a great great great grandfather Thomas Belk that was born in 1860 that was a sprung knife cutler who manufactured on Wilfrid road (which is the road running by Darnall steel works) and also lived at 150 Darnall rd for a time.
My grandfather and great grandfather were also both called Thomas Belk.
I would be really interested to find out any more info.