As day three dawned, the Staffords, and the 1st Parachute Battalion attacked at 04:00, their first objective being to link up with the 3rd Parachute Battalion trapped around St Elizabeth's Hospital. The attack failed but allowed Urquhart to rejoin the division from a position where he had been trapped by the Germans. This allowed Hicks to resume command of the brigade, whereupon Urquhart dispatched Colonel Barlow to take over command of 1st Parachute Brigade and co-ordinate the attack in Arnhem. He left in a jeep and was killed in a mortar barrage just outside Arnhem. The 1st Airlanding Brigade, still holding landing zone 'L' for the expected Polish and resupply gliders, then came under attack from the west and north-west. During the night the KOSB had tried to take the high ground at Koepel, but were stopped by heavy machine gun fire and instead dug in. The remainder of 4th Parachute Brigade advancing north of the railway line also encountered a strong German defence line and were unable to progress any further. All three battalions were ordered to withdraw south of the railway line towards Wolfheze. Although the northernmost battalion of the KOSB had thus far enjoyed a quiet morning, in the two hours it took them to advance south of the railway, two companies were now cut off and the entire battalion transport lost. Still under fire from the pursuing Germans, the battalions crossed landing zone 'L' just as the third lift gliders were landing. While attempting to unload the gliders the Poles came under fire. Assuming the approaching men were Germans, they opened fire and caused some casualties.