[Letter] 1816 Jan 4, Buckingham Street, Fitzroy Square [to] Saml. Parkes, Chemical Laboratory, Goswell Street / W.H. Wollaston. [2p. on 1 leaf, holograph signed. Is unperturbed by Parkes's information that a foreign producer is intending to export "platina" to England; suggests a better market for this unidentified producer is Paris, where Wollaston has refused to trade]