List of products of mines in the Duchy of Aosta that Baron d'Avise de Charvensod would like to exchange for samples from Cornish lead mines, Derbyshire mines and coal mines near Swanwick, Derbyshire. Has been unable to send promised drawings of birds and insects as preparations for the marriage of the Duke of Aoste have employed every painter in the city but shall try to send them soon. Introduces Henry Matthey of Turin who is attempting to set himself up in London, information on his family. Dr Ballardi has sent a box of plant specimens to Smith.