'Smith's own copy of Tunstall (the 1522 edition) is among his books still preserved today in Queens' College Library. He mad manuscript notes in this copy, which again enable us to see him at work. On one occasion, we can trace Smith's procedure from his annotations in Tunstall, via his notebooks in Queens', to the text of OWRF. We can trace the process by which he built up his work, gradually adding more information, including some from Budé. Tunstall:
Apud Romanos, dum floreret imperium: auri libra nummos aureos quadragenos octonos capiebat: quoru' singuli valebant denarios vicenos quinos. Ex his aurei quator unciam pendebant... (and later) apud nostrates Anglos: quoru' aurei quator, quos Nobiles Rosatos vulgo voca't
("among the Romans, when the empire was flourishing, a pound of gold contained 48 aurei, each one of which was worth 25 denarii ... among our English ones, of which four aurei, which are commonly called Rose Nobles.")
In the margins, Smith has made various annotations:
libra Ro. 48 ryalls co'p'hendebat ("the Roman pound is comprised of 48 ryalls")
uncia 4o ryalls ("the uncia 4 ryalls")
Aure' au' [? - looks like "the" but cannot be right] ryall et co'plectitur .25. denarios ("[ ] ryall and embraces 25 denarii")
and later: Nobiles Rosati.'
(Burnnet - Simpson - Thorpe 2017, p. 113)