I don't think there is one, so if you want to get started, feel free. I don't know what he was making before the Soho Mint shut in the late 1840s, but following the sale in 1848 he moved to Australia where he set up the Kangaroo mint office in the early 50s. This was not a succes and so he returned in about 1860 or so. His work producing restrikes is thought to have started around 1862 and continued for the next 20 years.