SIGNED ON THE DAY HIS FRIEND, THE CHEMIST BERTHOLLET, DIED LAPLACE, PIERRE SIMON. Autograph Letter Signed, "M[arqu]is de Laplace," to Antoine-François-Claude Ferrand, in French, respectfully declining an invitation because of commitments to care for his dying friend [Claude Louis] Berthollet. 1/2 page, 4to, with integral address leaf, addressed in holograph; minor loss at right edge from seal tear, faint staining at upper right, folds. Np, 6 November 1822
![LAPLACE, PIERRE SIMON. Autograph Letter Signed, M[arqu]is de Laplace, to Antoine-François-Claude Ferrand, in French,](https://catalogue.swanngalleries.com/full//410\801410.jpg)
