I came across an internet copy of Carlisle's "A Memoir of the Life and Works of William Wyon, Esq. A.R.A. " (link below).
Here's one of Wyon's later works, BHM 2185, 1844, 73mm - Reopening of the Royal Exchange in frosted silver. The details on this high relief medal are awesome!
https://books.google.com/books?id=IVcEAAAAQAAJ&pg=PA140&lpg=PA140&dq=william+wyon+memoirs&source=bl&ots=879i1jQmOT&sig=zFYmDbVFB3kg2Z7xCUsx2bVWA88&hl=en&sa=X&ved=0CEIQ6AEwA2oVChMIpcqx_c7JyAIVWFmICh0c2QvT#v=onepage&q=william%20wyon%20memoirs&f=false