We have now finally tracked down Angus Gunn's death - in New York in 1846. He is entered on his daughter Mary's marriage record to John Mitchell in 1855 as an indigo manufacturer resident in Harlem, deceased. A search of New York City Municipal Deaths 1795-1949 reveals the following:
Name: Angus Gunn Sex: Male Age: 60 Birth Year (Estimated): 1786
Birthplace: Scotland Residence: New York, N.Y. Address 122nd Street Event Type: Death Date: 12 Jul 1846 Place: Manhattan, New York County, New York. Certificate No. Bk15 Cemetery: Trinity
122nd Street is in Harlem.
That his occupation in America was indigo manufacturer is not so surprising as we've always known he had some kind of connection with it. Presumably that was why he moved down to Lancashire. His son George married Emma Sophia Greenhalgh, whose father was a calico printer. Indigo is used in calico printing.
