Thank you stanmapstone, this link helped me to understand several things:
1) Masters of a trade paid tax money to have an apprentice(s) - {so Jonas Emery was a silversmith, since I know for cetain that Hippolitus was one. This also clarifies that Louis was a silversmith as well, which I can confirm through the society of Jersey, Channel Islands} There is another Louis who became a physician, and I confused the two.
2) The taxes can be paid at any time; before, during, or even after the apprenticeship has finished.
I can now neaten up my notes.
