sentences:  Most decisively, the Earl of Newcastle, whose support was necessary in any campaign against London, declared himself unable to march south while Hull remained in Parliamentarian hands, leaving Charles too weak to contemplate such a move.The first shots were fired in the afternoon as Sir Jacob Astley established his forces near Issold's House on the eastern side of the city.Lord Forth, who had been given overall command of the siege, set up a fortified leaguer to the rear of the ruined Llanthony Secunda Priory and established his forces to the south of the city.