Letter received by Banks from Marmaduke Tunstall, 28 June1785 (Series 72.187) - No. 0005

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the same happened & had again 2 calves twins of each sex, both which I preserved, the cow-calf tho' apparently no way different from usual, has not as yet as far as myself, Steward & Husbandman observed, showed any desires after the bull;  as Dr. Hunter's System, tho' very curious & plausibly maintained seemed so extremely to contradict the established laws of nature was happy to have an opportunity of either confirming or reputing the universality at least of it - that it is not so in the human species, can myself ever, in the neighbourhood of my brother in Holderness is a young woman born twin with a brother, now mother of many children.  Next year you may depend on my troubling you with every particular of my supposed free-martin, tho' perhaps trifling in itself as averse to an opinion established by a person of such capital talents it is I think something interesting.

     An accident which happened to myself last year I must trouble you with on account of, as rather singular, I have a small paddock of deer, which being