re: Merchant houses in London (and Belfast, Ireland) including Adair, Jackson & Co.,linked to the Irish linen manufacture, acted as intermediaries in the Irish-American commerce, moving bounty linens through London to the American colonies. (Philadelphia : Orr, Dunlope & Glenholme (letterbook ?), 24 & 27 Feb 1768, 11 March 1768).
New York - Beekman Letter Book, Dec 21 1752 to (Patrick) Adair (&) Jackson.
An interesting aspect to this is that a search of "George Dunlope" in the "Belfast Newsletter" at :
brings up information that Dunlop / Dunlope was advertising for emigrants to America, i.e. 114754 11 April 1769 Philadelphia.American ship "Philadelphia", David McCutcheon master. Gregs (Greg / Gregg) & Cunningham, George Dunlope, John McAlester (McAllister), John Stewart, Ballycastle lodgings. Robert Moore, New Kay (Quay).
(Dunlop may have been relative of Hugh Boyd, Ballycastle, a relative of Sir Robert Adair's wife ?)
114739 11 April 1769 George Dunlope, Ballycastle, co. Antrim (N. Ireland) partner Andrew Orr, Belfast, House of Orr Dunlope and Glenholme.
71818, 23 Aug 1765 Sailing vessel, New York, America "Lord Dunluce", Larne, John Monford. Apply John Wilson, George Dunlope, Ballycastle, Robert McKedy, Ballymena, merchants.
(more entries in "Belfast Newsletter" for George Dunlope).
Some deeds in the Adair files for Dunlop were : HA12/F2/1/26. AD1683. Alexander Dunlop HA12/F4/1/16. 24 June 1703. Charles Dunlope HA12/F2/4/52. 10 Dec 1723. Wm Dunlop
A couple of early deeds in the Adair files for Orr were : HA12/F2/3/33. 13 May 1665, James Orr HA12/F4/1/13. 6 Mar 1657. Dr. Wm Orr(Rev. Dr. Orr ?) HA12/F2/2/21 Townland of Gallygarvey. Wm Dunlop