The Coast of Adventure by Harold Bindloss

It was late when Walthew led Blanca's mule through the rebel camp to the table under a tree where Don Martin sat writing. There was a half moon in the sky, and as they passed between the rows of motionless, dark figures stretched on the ground, here and there an upturned face caught the light and shone a livid white. In places a sentry's form was silhouetted, vague and black, against the sky, but except for this all was wrapped in puzzling shadow, and silence brooded over the camp.

One of Don Martin's staff sat beside the table, smoking a cigarette, another lay asleep near by, but a small lamp burned steadily near the leader's hand, lighting up his grave face against the gloom. He put down his pen and waited when Walthew stopped the mule and helped the girl to dismount.