Your letter of the 3d. was recieved in due time. it was impossible the designs therein inclosed could have been addressed to a person more inept in things of that kind. to supply my own incapacity, & yet answer your views, I referred them to mr Barlow whose science & poetical imagination qualified him to give an opinion worthy of attention. I now inclose you his answer which I dare say you will read with the satisfaction I have done it. having in this rendered you a greater service than would have been done by any observations of my own, I return the drawings with my salutations & assurances of great respect.