Hartley's decision to use cast iron was an economic one as at the time it was cheaper than granite, however the Albert Dock's construction still required so much granite that the dock trustee's had to open their own mine in Kirkcudbrightshire in Scotland.
Hartley's decision to use cast iron was an economic one. It was cheaper than granite. This was at the time. The dock trustee's had to open their own mine in Kirkcudbrightshire in Scotland. The Albert Dock's construction still required so much granite this.