There are claims that there was coal mining on Celtic’s purchased Westhorn/Westthorn land. This a lie.
In the 1828-29 Post Office directory there are three entries for Westthorn Colliery all at 41 Dunlop St:
Now Dunlop St doesn’t exist any more but a handy site shows what it is called now:
And where is Corbett St, Tollcross? Well it’s miles away passed the cemetery on the other side of London Road. The Westthorn Estate was large. Celtic’s land is miles west of the colliery.
There were also a couple of accidents in 1810-1811 mentioned at Westthorn/West-thorn in the Scottish Mining website.