You are too kind, Zak!

Not the original Thomas Tillotson - too early (founded company 1774, died 1803). In 1797 name changed to Thomas Tillotson & Sons - John and George were the sons. The name changed again to Thomas Tillotson & Son - after John took over the firm. George had his own business. John had two sons - John and Thomas - he handed them the business in 1831. They styled themselves T & J Tillotson. John left the business and Thomas run it by 1850. Sometime around that date the name changed to Thomas Tillotson & Co and carried on that way to 1861.

So it could have been T & J Tillotson or Thomas Tillotson the second.

Regards,
Neil