diplodicus, these Ingram watchmakers of yours are so interesting! They are also well documented.
John, I suspect to be the eldest who set up in business in Cardiff had a grandson, also named John who accompanied his own son, Ernest to the South African Wars. John ended up in hospital in Matabeleland and wrote several interesting letters home, published in the Welsh Newspapers Online. There is also a postcard addressed to him in Mashonland on Google Images, as well as a fine timepiece made by John Ingram of Cardiff.
I wondered if you have seen this entry from
Clockmakers & Watchmakers of Scotland 1453 – 1900, page 152, author: Donald White 2005
INGRAM, John, Clock & Watchmaker, baptised 23 Mar 1753 at Cairnie, near Huntly, Aberdeenshire, son of James & Janet Ingram of Whitestones Farm. May have beeen apprenticed in Scotland. Brother of Alexander Ingram (1751 – 1829), of Leith, Midlothiaan, author and mathematician, who left him money and his library. Married Ann and had children at Cairnie, before moving to Abergavenny, Monmouthshire, Wales, about 1796, and worked there until his death in 1831. Four sons became clockmakers in Abergavenny and Cardiff.
Alexander Ingram's will can be downloaded from
http://www.scotlandspeople.gov.uk/If you haven't used the site before you will need to purchase credits to view the record.
Also this site has interesting background:
http://mongenes.org.uk/Epidemics%20%26%20Sanitation/epidemicsandsani.htmlLooks like you not only need to cross Offa's Dyke but also Hadrian's Wall!!