The River Tamar is a river in southwest England, forming the border between Devon and Cornwall.

In London Labour and the London Poor edition: 

Phase 1

Statement of a Returned Convict. (Volume 3): "All the time I consider I was very hardly treated. I hadn’t clothes half the time, being allowed only two slop-suits in a year, and no bed to lie on when we had to stay out all night with the boats by the river Tamar. With 12 years’ service at this my time was up, but I had incurred several punishments before it was up."