Personal data
Joseph Yorke
Born June 24, 1724   Died December 2, 1792  
Lord Dover

Son of Phillip Yorke, 1st Earl of Hardwicke (1690-1764), and Margaret Cocks (d. 1761). 

LL.D. from Glasgow (1752). Secretary to the Embassy at Paris (1749-1751). Minister at the Hague (1751-1761). MP for East Grinstead (1751-1761). MP for Dover (1761-74). MP for Grampound (1774-1780). British Ambassador to the States General (Holland) (1761-1780). Created Baron Dover in 1788.1

In 1783, Yorke married Christiana Charlotte Margaret de Stöcken, a daughter of Danish nobleman Johan Henrik, Baron de Stöcken, and widow of Jacob Filip, Baron van den Boetzelaer (d. 1781). Yorke died without issue in December 1792. His wife survived him for only a few months, dying in March 1793.

Boswell was introduced to Sir Joseph at the Hague on December 25, 1763, and met him several times over the next 7-8 months.

    Joseph Yorke, 1st Baron Dover (Wikipedia)
    Boswell in Holland 1763-64

    Unless otherwise noted, the source for a dated quotation of Boswell's is generally the corresponding volume of the Yale Trade Editions of Boswell's journals.