John Hamilton (2)
NB need to check whether these references are all the same John Hamilton
1871 John Hamilton 30, retired ship builders, lived in Logie, Perthshire with Clara Hamilton 25, James S Hamilton 5 Months, Jessie Hamilton 24 and his brother James Hamilton 22, ship draughtsman[1]
1877 John Hamilton, James Hamilton and Alexander Carnegie Kirk purchased the shipyard and engine works of Robert Napier and Sons for the sum of £270,000 and carried on the business under the old title[2].
1910 Partner in Robert Napier and Sons[3]