Now as all the world knows, that no effect in nature can be produced without a cause, and as it is as well known, that my uncle _Toby_ was neither a weaver--a gardener, or a gladiator----unless as a captain, you will needs have him one--but then he was only a captain of foot--and besides, the whole is an equivocation ----There is nothing left for us to suppose, but that my uncle _Toby's_ leg----but that will avail us little in the present hypothesis, unless it had proceeded from some ailment _in the foot_--whereas his leg was not emaciated from any disorder in his foot--for my uncle _Toby's_ leg was not emaciated at all. 
Now as no effect in nature can be produced without a cause, and as my uncle Toby was neither a weaver, a gardener, or a gladiator - unless by that you mean a captain of foot - we can only suppose that my uncle Toby's leg - but that will not aid us in this hypothesis, unless it proceeded from some ailment in the foot, which it did not - for my uncle Toby's leg was not emaciated at all. 