The Snare by Rafael Sabatini

The board of officers convened by Marshal Beresford to form the court that was to try Captain Tremayne, was presided over by General Sir Harry Stapleton, who was in command of the British troops quartered in Lisbon. It included, amongst others, the adjutant-general, Sir Terence O'Moy; Colonel Fletcher of the Engineers, who had come in haste from Torres Vedras, having first desired to be included in the board chiefly on account of his friendship for Tremayne; and Major Carruthers. The judge-advocate's task of conducting the case against the prisoner was deputed to the quartermaster of Tremayne's own regiment, Major Swan.

The court sat in a long, cheerless hall, once the refectory of the Franciscans, who had been the first tenants of Monsanto. It was stone-flagged, the windows set at a height of some ten feet from the ground, the bare, whitewashed walls hung with very wooden portraits of long-departed kings and princes of Portugal who had been benefactors of the order.