Autograph letter signed ('M. Faraday') to Professor William Crawford Williamson, asking him "to receive Professor Bussy of Paris kindly. I am sure you will like to know such a man and show him your laboratory", one page, pasted onto album page, minor browning to ink, Royal Institution of Great Britain, no date [1857] Antoine Alexandre Brutus Bussy (29 May 1794, Marseille - 1 February 1882, Paris) was a French chemist famous for discovering a method of preparing magnesium by heating magnesium chloride and potassium in a glass tube, which he described in 1831 in 'Mémoire sur le Radical métallique de la Magnésie'. He travelled to London in 1857.