In Strange Company by Guy Boothby

Quite an hour before daybreak Veneda was awakened by sounds of excitement in the streets. Bitterly cold though the morning proved, almost every one was astir, listening for the cannonading which would proclaim the opening of the engagement on the heights. The booming of a few guns came with the breaking day, faintly at first, but growing louder as the light increased. Without doubt the long-expected battle had commenced.

Following the example of his neighbours, Veneda threw up his window and leant out to listen. Somehow or other, since his conversation with the English merchant in the Calle de Victoria the previous night, his confidence in a victory for the Government had been a little shaken; and now for the first time he began to experience twinges of real alarm for his own immediate safety. Supposing he should be arrested by the Congressionalist leaders for his treachery to them, where would his escape be then? In that case Boulger would not wait, and Juanita for her own safety would be certain to betray him. But he reflected that it was full early yet to be frightened, and moreover he had been in so many close things before, that one more or less could hardly matter.