His L'Estoire des Engleis, or History of the English People, written about 1136–1140,[2] was a chronicle in eight-syllable rhyming couplets, running to 6,526 lines.
[2] The L'Estoire des Engleis opens with a brief mention of King Arthur, whose actions affect the plot of the interpolated tale of Havelok the Dane.
That aside, most of the first 3,500 lines are translations out of a variant text of the Anglo-Saxon Chronicle and subsequent portions from other (Latin and French) sources that remain unidentified.
[2] Gaimar claims to have also written a version of the Brut story, a translation of Geoffrey of Monmouth's chronicle Historia Regum Britanniae (c. 1136) into Anglo-Norman verse, which was commissioned by Constance, wife of Ralph FitzGilbert, a Lincolnshire landowner.
[7])[b] Additionally there is a mention of a sword, Calibur[8] (Excalibur), pointing to Gaimar's knowledge of Galfridian legendary history that predated the advent of Wace's Brut.