A vindication of a sermon, entitled, inoculation an indefensible practice. In which Dr. Kirkpatrick's Arguments in Favour of the Operation, together with his and a certain Letter-Writer's Objections to the Sermon, are distinctly consider'd and reply'd to; and the Practice demonstrated, in the amplest Manner, highly culpable in a Moral, extremely absurd in a Physical View. By Theodore Delafaye, A. M. Rector of St. Mildred's and All-Saints, in the City of Canterbury