Thank you for mentioning the mendip hospital cemetary, my ancestor died in Wells Asylum but before this cemetery opened but I figured I'd email them as you said they were helpful - and nothing ventured nothing gained
I emailed them at 12.43 today
They replied at 17.32
Giving me the date he was admitted and died (I already knew them but still very generous and SO QUICK) and this info 'This was some time before our cemetery was opened in 1874 and prior to this date most burials from the Asylum took place at Wells Cemetery. Confusingly, all the burials from the Asylum pre 1874 were recorded in the burial registers of East Horrington church (the nearest graveyard to the Asylum) and the funerals were conducted by the Asylum Chaplain (who was usually priest in charge at Horrington), but all interments after December 1854 certainly took place in Wells Cemetery.'
I had found the burial record but assumed he was buried in East Horrington
They also told me where to find other records on him - are held at the Somerset Archive at Taunton. The records you need will be:
1) The Deceased Patients Register for 1859. This will contain a lot of personal information relating to Samuel, being the actual committal form containing details of age, occupation, address, next of kin etc., plus a medical certificate with details of the illness. The link to this on the Somerset Archive is
http://somerset-cat.swheritage.org.uk/records/D/H/men/24/11 THEN
at 18.28 replied saying they forgot to give me the burial date - sending a copy of the burial record - and information on who conducted the service and some of his miltary history (he was Polish)
How helpful and nice are they!