|Title||Letter, 'Observations on the sugar ants' from John Castles to Melville|
|Date||2 May 1790|
Published in Philosophial Transactions, as 'Observations on the sugar ants. In a letter from John Castles, Esq. to Lieut. Gen. Melvill, F. R. S'
Read 6 May 1790
|Physical description||Ink on paper|
|Digital images||View item on Science in the Making|
|Related material||DOI: 10.1098/rstl.1790.0023|