I received your favour of the 18th inst & have examined the window frames and I think that by cutting the Doors to let the weights in, longer, we Can use Cast iron except there should be obstructions in some of the frames that we Cannot perceive at present, the advantage in lead would be that we Could draw them out when any occurred.—you will please to direct that be Cast very exact to the dimensions given & I should like them to get here as quick as possible Mr. Barrey has arrived—

I am Sir with respect your very Humble Servant