Stronghand by Gustave Aimard

After leaving the captain's study, Kidd halted in the anteroom, not because he had any plan formed, but through that instinct which urges villains of his species not to leave a good place till compelled. He had heard the captain summon his asistente. The latter, after a few moments' absence, returned to the anteroom with a look of importance which at once caused the adventurer to reflect, and suggested to him the idea of knowing what the conversation was the soldier had held with his chief. Isidro, the captain's asistente, was an Opatas Indian, of tried bravery and fidelity. Unluckily, though he did his duty in the battlefield, his intellect was rather restricted, and, like all Indians, he had a propensity for strong liquors, which had several times brought him to great grief. Kidd was familiar with the soldier, and knew his weakness; hence his plan was formed in a moment.

"Since you remain here," he said to him, "I shall be off: when I came to speak to the captain, I left a nearly full bottle of mezcal at the tocanda of Master Cospeto, and on my word I feel inclined to go and finish it. I will not invite you to accompany me, for your duty keeps you here; otherwise you may be assured that I should be delighted to empty it with you."