Hi Nick Following the link that Ron provided I checked the ownership of the first three steamships of the Gem line as a sample. http://www.dmcsoft.com/tamh/article.php?articleid=25 The Mercantile Navy List will nearly always list a Managing Owner rather then a Shipping Company name. The following are take from MNL 1880- 82 on the Clip web site http://www.crewlist.org.uk/data/vesselsalpha.php. SS. AMETHYST, 78691, Built Dundee 1879, Managing Owner Peter M Duncan Dundee. SS. BERYL, 82740, Built Dundee 1881, Managing Owner Peter M Duncan Dundee. SS. DIAMOND, 82744, Built Dundee 1881, Managing Owner Peter M Duncan Dundee. So Mr Duncan was a major share holder in the Gem Line, I cant explain why he is not mentioned in "William Robertson And The Gem Line" but if you check the other vessels from the TAMH list you might be able to build a time frame for his role as Managing Owner. Mick O Rourke Mariners List