Following a cold caught coming up from Scotland, he died the following year, 31 March 1791, at his newly purchased London home on Upper Grosvenor Street, bought from the Duke of Montrose.
After catching a cold that began in Scotland, he succumbed to illness the next year, 31 March 1791, at his new home in London located on Upper Grosvenor Street, which he had bought from the Duke of Montrose.