As it says on the tin. Henry III married in 1236 to a wife who was considerably younger than he was (her 1223 (13yo) to his 1207 (29yo)). The only betrothal before this I can find is to Yolande of Brittany (b.1218), but that it was cancelled by 1226. So, why did Hal marry as late as he did? It wasn't as though the succession was bursting with other boys - he only had a younger brother (who married in 1231). So surely this should've been an incentive for him to marry sooner not later?
Any thoughts?