Copy prospectus attributed to the Reverend Edward Nangle, founder of Achill Mission, seeking funding for the purchase of Achill Island from its owner, Sir Richard O'Donnell. The prospectus lists the names of the Mission's president, committee members and honorary secretary and provides an outline of the Mission's origins, its establishment in Achill in 1833, the initial difficulties experienced by its members and its many subsequent successes in converting the island's Catholic population to Protestantism. The document provides a unique insight into the philosophy of the Evangelical movement in early nineteenth-century Ireland and its use of the Irish language in the conversion process and the disharmony that existed between the Church of Ireland and the Church of Rome.