Sheffield Independent May 12, 1887
South Yorkshire Collieries and the Hull Coal Trade
Yesterday the Hull officials issued the monthly return of all coal which enters the port from the collieries in South and West Yorkshire, which again reveals the fact that there has been a large increase all round at the expense of the Northumberland coalfields where the ruinous strike still goes on.
The first place on the list again falls to the lot of Denaby Main, who managed to supply over 17,000 tons during the month.