I just got a book in the mail on the Highland Famine and its impact on highlanders in Argyll and elsewhere and thought of your Angus Livingston family research project your presently working on.
It is not clear what your ancestor Angus Livingston of Colonsay, Arygll died from when he died on Oct. 30, 1847 in Paisley, Renfrewshire where a son and daughter of his were residing at the time having also left Colonsay, Argyll. While most people are familiar with the effect the Potato crop failure of the 1840's had on Ireland, it is less commonly known that nearby Western Argyllshire was also severely affected. It is clear from contemporary accounts from the period of 1846 to 1847 that malnutrition and disease had become rampant in parts of Argyll such as Mull/Colonsay area linked to this disastrous crop failure. From T. M. Devine's book "The Great Highland Famine" " between the years 1846 and 1855 the potato, the main subsistence crop of the population of the Western Highlands and Islands, failed in whole or in part and destitution and the killer diseases associated with these conditions." "...massive external assistance was required to reduce the real danger posed to the lives of many thousands of people. .... the subsistence crisis had a fundamental impact on such crucial social indicators such as birth, marriage, emigration and migration. The famine caused a huge exodus from the stricken region on quite an unprecedented scale. The Highland Famine did not directly cause the deaths of many people except in 1846 and 1847 , but it did have momentous demographic consequences for the inhabitants of the north of Scotland." That being said there was a definite increase in malnutrition and disease in the Mull/Colonsay area and some of those suffering and sickened with disease ended up in the lowlands during the 1846 and 1847. Whether Angus left Colonsay before 1846 or after is not known for certain but his son Hugh we do know left following the 1841 Census and in the lowlands in 1842 when he married. Later by the time of the birth of a son Hugh in 1846 was residing in Paisley. His father we know from his final pension info died in October of 1847 likely at his son's residence presumingly. His daughter unmarried at the time her father's death may have lived with the brother as well. A year later she married Mr. Logan. We may not be able to say what Angus died from, but it well be that he was exposed to diseases that were on the increase in the lowlands and rampant in the Argyllshire amongst the impoverished and malnourished tenants.