I am a Derbyshire historian (not just specializing in mining). Your best source is the 19th century British Newspapers website - I am not sure if this is free to you in NZ. A very quick look at a couple of the hundreds of hits for Disney in the Derby Mercury newspaper gives the following info from The Derby Mercury (Derby, England), Wednesday, August 26, 1874; Issue 8353:
Mr. H. Cathrow Disney of the Morley Works, near Belper, has failed for £17,000. The works consist principally of two blast-furnaces, and it is not unlikely that the estate will turn out tolerably well.
There is much later information on his bankruptcy.
Let me know if you need further assistance