Possible Clues:

• Rower
• Male rower
• Crew member
• Is capable of a good row with one of those familiar with Schull report
• One who rows, rows, rows the boat
• Enjoys a good row with one pulling a stroke
• ... and what he's asked to do
• Sweeper, perhaps, or maybe stroke
• Holding a sweep, he may get into a row
• Arranged a ransom for galley slave, say