A solemne ingagement of the armie under the command of His Excellency Sr. Thomas Fairfax : with a declaration of their resolutions as to disbanding : and a brief vindication of their principles and intentions in relation to diverse scandalous things suggested against them : read, asserted unto, and subscribed by all the offices and souldiers of the severall regiments at the general rendezvouz near Newmarket, June 5, 1647.