sentences:  This was in part because of weeks of arrears owed to the soldiers, and in frustration of the slow progress parliament had made in securing a settlement with the imprisoned Charles I.The agreement was read, and assented to by all the officers and soldiers of the regiments of the New Model Army that rendezvoused on Kentford Heath near Newmarket on Friday and Saturday 4 and 5 June.On 8 June Fairfax sent the Solemn Engagement to Parliament with a letter.