I rather doubt TB. The Furness peninsula had the reputation of being one of the healthiest places in Britain where people lived a long time. Millicent died in Brompton in London and was buried in Broadstairs on 16 Sept 1822. Robert wrote his will on 23 Sep 1822 appointing as trustees and guardians his good friends James Machell of Pennybridge, James Satterthwaite of Lancaster and Widow Elizabeth Postlethwaite of Grange. The will was witnessed by Wm Tribe of Worthing, Attorney at Law, and by Robert Hackett servant to Robert Michaelson. It is clear that Robert M knew he was dying. He was buried at Broadwater St Mary on 2 Oct 1822. The will was proved at London on 17 Oct 1822. Robert left all his household goods, furniture, plate and wines, to his eldest son Thomas Yeates Parker Michaelson, then aged 8. On 19 May 1823 all these household goods were offered for sale prior to letting out the large Mansion house on Barrow Island on May 25th. The list of goods for sale is very impressive. (Lancaster Gazette 26 Apr 1823)