Facts and Events
Thomas McCaslin was born somewhere in Ireland. It appears that his family immigrated to Canada, possibly about 1832 due to the Potato Famine (not the GREAT potato famine in 1846-1848). The family traditions is that 2 brothers, or 2 brothers and a sister came from Ireland. We assume this would be Thomas McCaslin, his sister Ellen McCaslin - and possibly an Oliver McCaslin who is also born in Ireland and lives in Ontario about the same time. We do know for a fact that Ellen McCaslin is Thomas' sister, but do not have any evidence that Oliver is their brother.
It appears that Thomas had a mental illness. He spent a lot of time in Mental Asylums, and was diagnosed with "Recurrant Mania". This was considered Hereditary, and Ellen had also spent time in Asylums. From the description of his behaviour, the condition may have been what is now called Bi-Polar disorder - although it could have been an other condition, like psychizophrenia. He escaped from an asylum at one point.
One of the Asylums that Thomas spent time in was the Mimico Asylum in Ontario. He would have been amoung its first inmates - which means that he would have been working on building the asylum. (The asylums used the inmates as unpaid labour as a part of their therapy.) He died in the asylum - apparently collapsing in the field on a hot day.
I have not yet found Thomas' burial, but it is likely that he was buried in the Mimico Asylum's graveyard. I have not yet checked their records. He would have been one of the first people buried there - and the graves were unmarked.