Hans Christophe Ernst baron de Gagern (1766-1852). Signed letter,

to A.W.C. baron de Nagell d'Ampsen, dated "Hornau pres Francfurt 30. oct. 1818", bifolium with only the first page written, 21 x 16.8 cm. (with middle fold), inserted in file with 19th-century auction strip to front.

See extensively on baron de Gagern: https://tinyurl.com/m7ymy2o. This letter concerns the regulation of the emigration for Mr. Adams, state secretary of the United States at Washington.