DORDRECHT -- DE KAT -- COLLECTION OF 13 LETTERS on financial affairs (mainly orders to buy and sell shares) addressed to "Burger" Otto de Kat (1737-1829), written by various hands between 1785 and 1797. Mss., 11 w. (wax) seals on laid paper, r° & v°. (1 letter torn in two and w. traces of clumsy rep.). -- Added: 16 o. related printed and written documents. -- (29).