Letters on Iceland : containing observations on the civil, literary, ecclesiastical, and natural history, antiquities, volcanos, basaltes, hot springs, customs, dress, manners of the inhabitants, &c. &c., made, during a voyage undertaken in the year 1772, by Joseph Banks, Esq., P.R.S., assisted by Dr. Solander, F.R.S., Dr. J. Lind, F.R.S., Dr. Uno von Troil, and several other literary and ingenious gentlemen