John G. Edgar 
The Boy Crusaders [EPUB ebook] 

AMONG the many adventurous enterprises which rendered the age of feudalism and chain-armour memorable in history, none were more remarkable or important than the ‘armed pilgrimages’ popularly known as the Crusades; and, among the expeditions which the warriors of mediæval Europe undertook with the view of rescuing the Holy Sepulchre from the Saracens, hardly one is so interesting as that which had Louis IX. for its chief and Joinville for its chronicler.
In this volume I have related the adventures of two striplings, who, after serving their apprenticeship to chivalry in a feudal castle in the north of England, assumed the cross, embarked for the East, took part in the crusade headed by the saint-King of France, and participated in the glory and disaster which attended the Christian army, after landing at Damietta-including the carnage of Mansourah, and the massacre of Minieh.