I was originally from Belfast and dug into my dusty files regarding early emigration to America. I found that John and James Holmes were Belfast merchants in the flaxseed and linen trade who annually sent the ship Barclay to Delaware. The prime reason for this was that they had a brother named Hugh who was a partner in the Philadelphia based companies of Holmes & Ralston and Holmes and Rainey. Between 1750 and 1775 there appeared 442 advertisements regarding sailing to America and 53% were to Philadelphia whereas only 18% were to New York. I suspect that Samuel Holmes & Son Co., Linenwarehouse listed in the 1843 Belfast directory was likely a descendant of either John or James and most likely a son. The Barclay likely carried emigrating passengers directly from Belfast to Delaware and there may be records of who they were. I hope this is of some interest. In my day there was a linen firm called McCaw, Stevenson & Orr and there may be a connection.