On 14 December 1829, John Clarkson, Benjamin Clarkson, and Thomas Clarkson acknoweldged they had received their proportions from the estate of Richard Clarkson, and Susan L. Clarkson acknowledged she had “received the amt. due to her & her children.” [Essex County, Virginia, Will Book 22, page 190.]

On 18 April 1831, Thomas Clarkson witnessed the will of Martha Clark. [Essex County, Virginia, Will Book 24, page 380.]