The date of his death is on this newspaper article about his will
Stamford Mercury - Friday 21 September 1860
STATUTORY NOTICE to CREDITORS. THOMAS CLARKE, deceased. PURSUANT to the Act of Parliament 22d and 23d Victoria, c. 35, intituled "An Act to further amend the Law of Property and to relieve Trustees," all Persons claiming to be Creditors of THOMAS CLARKE, late of West Ashby, in the county of Lincoln, veterinary Surgeon, deceased who died on the 26th day of June, 1860, are hereby required to send or before the 20th day of October next the particulars of their Debts or Claims to me, at my Office in Horncastle, to the said county of Lincoln, or in default thereof the Executors under the Will of the said Thomas Clarke, deceased, will, after the said 20th day of October next distribute the Assets of the said Thomas Clarke, deceased, amongst the parties entitled thereto, having regard to the Debts or Claims of which they shall then have had notice; and all Persons owing any Money to the Estate of the said Thomas Clarke, deceased are requested to pay the amount forthwith at my Office.—Dated this Fourteenth day of September, one thousand eight hundred and sixty. FRED. W. TWEED, Solicitor for the Executors of the late THOMAS CLARKE, deceased Horncastle, 14th September, 1860.
Tom