More Comiston Springs

Came home from church by way of Whitehouse Loan, which is one of the places that one can see marks indicating the route of the water pipes from Comiston Cistern to the reservoir at Castlehill (much clearer viewed in large).

In these two stone squares the numbers represent the bore in inches of the pipes (made of hollow tree trunks) lying below. On the left the 5 represents the later Comiston pipe, being a replacement in 1704 for the original 3-inch bore. The 7 on the right denotes a later system laid alongside in 1758, when the springs at Swanston were added to the supply.