At 04:10 on Saturday 27 October a post held by the 1st County of London Yeomanry (Middlesex, Duke of Cambridge's) to the west of Bir el Girheir on Point 630 was attacked by an Ottoman cavalry patrol "in great strength."
About 05:30 the infantry and cavalry, estimated by a Royal Flying Corps reconnaissance aircraft to be a force of 2,000, attacked the outpost line, becoming heavily engaged on Hill 630, where the attack on both flanks was supported by heavy machine gun and artillery fire.
At 06:48, the 8th Mounted Brigade reported Ottoman units attacking Point 630 and a hill 1.5 miles (2.4 km) to the south east, with an infantry battalion of the 158th Brigade (53rd Division) advancing towards Point 630, with one battalion and one battery at Sebil/Point 550.
Two troops of 1st County of London Yeomanry (Middlesex, Duke of Cambridge's) ordered forward to the right of the post, advanced through heavy fire to find the post almost surrounded.
A squadron of the City of London Yeomanry in reserve advanced, also under heavy fire, to occupy a position 200 yards (180 m) south of the threatened post and stopped the Ottoman forces from completely surrounding it.
By 07:55 two, or more camel guns were seen approaching Point 630 from Bir Ifteis while the yeomanry garrisons on Point 630 continued to hold their ground.
However, as reinforcements including infantry were fighting their way forward to relieve Point 630 they were heavily fired on about 10:30, causing the reinforcements to fall back.
However, by 10:55 the infantry attack began to develop, moving up the slope of Point 630.

Although the defending garrison was driven off Hill 630, the squadron withdrew to "a cruciform trench just below the top of the hill", built by the Australian Mounted Division.
The squadron managed to hold out there, during the day against odds of 20 to one when the attackers closed to within 40 yards (37 m) causing four deaths and wounding 14 yeomanry.
Fighting continued until late in the afternoon when the 159th Brigade of the 53rd (Welsh) Division was deployed against Point 630 and Kh.
Imeih, forcing the Ottoman attackers to withdraw.
At 04:10 on Saturday 27 October a post held by the 1st County of London Yeomanry (Middlesex, Duke of Cambridge's) to the west of Bir el Girheir on Point 630 was attacked by an Ottoman cavalry patrol "in great strength." About 05:30 the infantry and cavalry, estimated by a Royal Flying Corps reconnaissance aircraft to be a force of 2,000, attacked the outpost line, becoming heavily engaged on Hill 630, where the attack on both flanks was supported by heavy machine gun and artillery fire. At 06:48, the 8th Mounted Brigade reported Ottoman units attacking Point 630 and a hill 1.5 miles (2.4 km) to the south east, with an infantry battalion of the 158th Brigade (53rd Division) advancing towards Point 630, with one battalion and one battery at Sebil/Point 550. Two troops of 1st County of London Yeomanry (Middlesex, Duke of Cambridge's) ordered forward to the right of the post, advanced through heavy fire to find the post almost surrounded. A squadron of the City of London Yeomanry in reserve advanced, also under heavy fire, to occupy a position 200 yards (180 m) south of the threatened post and stopped the Ottoman forces from completely surrounding it. By 07:55 two, or more camel guns were seen approaching Point 630 from Bir Ifteis while the yeomanry garrisons on Point 630 continued to hold their ground. However, as reinforcements including infantry were fighting their way forward to relieve Point 630 they were heavily fired on about 10:30, causing the reinforcements to fall back. However, by 10:55 the infantry attack began to develop, moving up the slope of Point 630.
Although the defending garrison was driven off Hill 630, the squadron withdrew to "a cruciform trench just below the top of the hill", built by the Australian Mounted Division. The squadron managed to hold out there, during the day against odds of 20 to one when the attackers closed to within 40 yards (37 m) causing four deaths and wounding 14 yeomanry. Fighting continued until late in the afternoon when the 159th Brigade of the 53rd (Welsh) Division was deployed against Point 630 and Kh. Imeih, forcing the Ottoman attackers to withdraw.
Battle of Buqqar Ridge