In 1787 Thomas Rosewall became a beneficiary of his father's will, receiving his estate in Merther in Towednack Church Town, which his father had already settled on him by Deed of Gift.
In 1802 Thomas Rosewall and his brother John were granted Administration of their mother's personal estate.
In 1810 Thos. Rosewall of the borough of St. Ives was a beneficiary of the will of his father-in-law Sampson Curnow of Towednack, receiving 10 shillings sixpence.
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Thomas Rosewall of Hellesveare St. Ives died aged 87 years (burial record).
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At Hellesvere, near St. Ives, Mr. Thomas Rosewall, aged 87.
Royal Cornwall Gazette, Friday, 8 Jan 1841, p. 3
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At St. Ives, on the 5th instant, Thos. Rosewall, Esq., aged 86 years.
The West Briton and Cornwall Advertiser, Friday, 15 Jan 1841, p. 3