Hi,
I'm no expert, and tracking down mariners is notoriosly difficult. However, I know from my own experience that, if he died a Master, then you're in luck, he should be in the master's registers at the Guildhall library in London. This will probably either mean going there yourself, or calling them and perhaps asking them to look him up on your behalf. I'd recommend the former if possible - a photo is no substitute actually seeing their names in the dusty ledgers!
From there you can order copies of his certificates, which should give you a clear history of his maritime career, including his last known vessel. You can then investigate the other vessels listed and create a picture of his travels over the years.
The names of many of those who became Masters have been indexed after 1859 and you can access them on line - but, typically, they're still in the process of indexing 'S'.
http://www.history.ac.uk/gh/capintro.htm Newspaper archives are also a fantastic source.
A search of Masters on Mystic Seaport throws up a few possibilities if you fancy trawling through
http://library.mysticseaport.org/initiative/MSearchIndex.cfmI'll keep thinking, hope that helps in the meantime.
Ann