In this historical novel, the English mercenary company fights against French, Breton and Spaniards, in 1367. They are caught in fire from Castilian slingers. Excerpt:

But there was little rest for the victors. Whilst the knights had charged them in front the slingers had crept round upon either flank and had gained a footing upon the cliffs and behind the outlying rocks. A storm of stones broke suddenly upon the defenders, who, drawn up in lines upon the exposed summit, offered a fair mark to their hidden foes. Johnston, the old archer, was struck upon the temple and fell dead without a groan, while fifteen of his bowmen and six of the men-at-arms were struck down at the same moment. The others lay on their faces to avoid the deadly hail, while at each side of the plateau a fringe of bowmen exchanged shots with the slingers and crossbowmen among the rocks, aiming mainly at those who had swarmed up the cliffs, and bursting into laughter and cheers when a well-aimed shaft brought one of their opponents toppling down from his lofty perch.