John Ramsay MAC CULLOCH (1789–1864). L.A.S., April 17, 1855, to Adam Black; 1 page, in-8; in English. He sends him the article “Exchange,” along with a new article on negotiation and the law (“On the Negotiation and Law (bells)”), asking Black to review it in its entirety. This article comes at a bad time, but he has been very busy and will continue to be so with various meetings…