I don't know how I missed this the first time round.
Tongtwister is right about the lion being from Exeter. I have seen it on tongs by Joseph Hicks and Thomas Eustace and also a pair by JT which has now been identified as the mark of Jonathon Tingcombe.
The attribution to Trowbridge and Ashford also seems very likely to me. There was no other TA at the time. The assay books record many tongs made by them. Their last assay was 3rd October 1783, after which Trowbridge continued on his own. Strangely, this lion differs to the one on contemporary date-lettered pieces (eg tablespoons), so it isn't easy to date exactly, but I would estimate c.1780-84.
Another mark found!
Miles
![Image](http://i64.photobucket.com/albums/h200/granmaa/51h-1.jpg)