LA PLACE, Pierre-Simon, Marquis de (1749-1827). Autograph letter signed to Monsieur Herschel, Paris, 27 March 1823, requesting him to present to the Royal Society and the Astronomical Society of London on his behalf copies of the fifth and final volume of his Traité de Mécanique Céleste', 'Je desire spécialement qu'il interesse Monsieur Herschel, au suffrage duquel j'attache beaucoup de prix', ½ page, 4to (addressed to Herschel on verso).