Follow-up to Chris' informative message
Don McConnell
>As best we've been able to reconstruct, known working dates for John Harrison & Son, Hollis Croft, Sheffield, are 1787 to 1816. They were also listed as Steel Converters and Refiners, clearly indicating that they were producing crucible, or cast, steel. The firm may predate 1787 by a few years, but the "Cast Steel" marking and Samuel Crompton's dates are all reasonably consistent with this time-frame.
A saw which beloned to Judah Woodruff, Farmington CT, may be somewhat earlier, It was made by London saw maker, "White," and is thought to be from mid-eighteenth century (according to Gaynor & Hagedorn in _Tools, Working Wood in Eighteenth-Century America_). I have provided that image, and it will readily be seen that the description of the Harrison saw, as reported by Chris, could easily be describing this White saw.
It may be a good idea to briefly address the question as to what type of handle English saws would have sported in the early eighteenth century. The closed, or "D" style handle is known to have been developed by the latter part of the 17th century. Specifically, a 1691 Swedish publication (A. C. Ralamb, _Skeps Byggerij_ [Ship Building], Stockholm) shows an English hand saw with a closed handle which is, stylistically, fairly similar to the handle shown in the accompanying image. While this doesn't prove exactly what the 1710 Tenant Saw handles would have looked like, I think it puts us on fairly safe ground as to their general appearance.
Don McConnell
Eureka Springs, AR
