1To John Adams from John Sinclair, 18 May 1792 (Adams Papers)
I beg your attention to the inclosed papers, & will be glad to be favoured with your sentiments upon the subjects to which they relate.—I am afraid there is little prospect of our meeting again, but it will always give me pleasure to hear of your health & happiness; being with great regard, your very faithful / humble Servant MHi : Adams Papers.
2To John Adams from John Sinclair, 15 June 1793 (Adams Papers)
I have the pleasure of sending you by Dr Adair, (whom I beg to recommend to your attention & civilities) the printed plan of the Board of Agriculture about to be established here.—I shall have the honour of sending you the regulations we adopt, as soon as they are drawn up, & we shall have much pleasure in corresponding with all similar institutions in America.—I shall write more fully in...
3To John Adams from John Sinclair, 5 July 1794 (Adams Papers)
I request the favour of your attention to the bearer, William Strickland Esqr, a gentleman of considerable Property in Yorkshire, and an honorary member of the Board of agricultural, who proposes taking an agricultural survey of America. Any civilities you will have the goodness to show to him, will much oblige, Your very faithful / humble Servant MHi : Adams Papers.
4To John Adams from John Sinclair, 18 July 1795 (Adams Papers)
I take the Liberty of inclosing the Plan of an Agreement which I am anxious should be entered into by the powers of Europe and the United States of America for the purpose of rewarding those who make any discovery of General benefit to Society. Having endeavoured in the inclosed Paper to delineate the Nature and importance of Such a measure, it is unnecessary for me to trouble you with...
5To John Adams from John Sinclair, 10 September 1796 (Adams Papers)
Sir John Sinclair presents his best compliments to Mr: Adams.—Has the honour of sending him, some of the papers printed by the Board of Agriculture of which he requests his acceptance, and should be happy to receive any communications upon Agriculturical subjects, with which Mr: Adams may have the goodness to favour the board.— MHi : Adams Papers.