for pillage caused the Londoners to bar the gates. This in turn caused Margaret to hesitate, as did the news of the Yorkist victory at Mortimer's Cross. The Lancastrians fell back through Dunstable, losing many Scots and Borderers who deserted and returned home with the plunder they had already gathered. Edward of March and Warwick entered London on 2 March, and Edward was quickly proclaimed King Edward IV of England. Within a few weeks he had confirmed his hold on the throne with a decisive victory at the Battle of Towton. Alignment controversy Conventional sketch maps of Mortimer's Cross show the armies facing each other across the valley with the River Lugg at the rear of Edward's Yorkist army. This almost east/west alignment is partly based on the supposed approach routes of both armies. It has been pointed out that this would mean that Yorkist Edward had the river at his back, an obstacle which would invite disaster if the Yorkists were either pushed back or routed. His fleeing men would be cut down from behind while trying to wade the shallows. Edward was known to be militarily astute (or at least well advised) and he is likely to have been well aware of this risk. Writing for Hobilar, the Journal of the Lance and Longbow Society Andy Lamkowski suggests that a second battlefield alignment is quite plausible; that Edward drew up across the valley with the River Lugg on his left (with the Yorkists facing almost south) and the Lancastrians drew up facing almost north with the river on their right. The narrowness of the valley close to the bridge would probably mean that the two armies each drew up in a column of three divisions—if they fought close to the river crossing—but the ground widens significantly towards the present Battle Acre Cottage and Drybridge House. At that point a traditional 'three units' battle line is possible. Author Andrew Boardman also suggests that an alternative interpretation is possible saying: "It may be safe to assume that the battle was fought somewhere in the vicinity, possibly with the river securing the flanks of both armies and the hills the other". Andrew Boardman also quotes William Gregory (Gregory's Chronicle) saying that Edward: "Met his enemies on a fair plain near to Mortimer's Cross, not far from Hereford East". The usual placing of the battle in the valley beside the bridge is