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Mr Mulcaster. Farnacres 13th April 1773 I have received your Letter as also the Bullion which you will set down 1154 Ounces in the Operation and that exceeds the calculation nearly 50 Ounces; indeed I always observe we get the most Silver when we take off the large Cakes, compared with Assays. You are 1Cwt wrong in your last quantity where you reckon to have lost by Refining and Reducing. You have it 209.2.5 it shd be 208.2.5 I shall take care to alter the Operation last sent as to the Slag Lead and the rest may remain til we come up. Though your reasoning is good about the Borehole I stil hope the Water may be regained; if it should not the Expence of a Trial to get it will not be great. When you compute what Lead you immagine to be in the Tails etc which will remain unsmelted at the end of the Operation 1st May I would have you as hitherto give us the best estimate you can of the expence of bringing those Tails etc into Lead. The Litharge Lead for Refining must be refined by itself and the Bullion taken off also by itself. I am your most hble Servt N W Junr PS I believe Mr Smeaton will not be with me upon the 24th instant as I expect he will meet me at Keswick. Mrs Brown has not been as yet wrote to about removing the Corn and Stacking it at the Door and I therefore desire you will apply to her. I shd be glad to know whether there is any Straw brought back again or not and pray tell her I have asked you. The number of Fodders in the whole including what is now at the Helm should be reckoned 24 so you will compute as near as you can what is not removed and make her bring as many Fodders as to make up the deficiency.