SPAD -
All my research material is in boxes while were are in the process of moving, but I'm sure
Harold Mellings was in 210 Squadron. Attached is an undated photo of him.
This snippet is from my article about Ken Unger - also 210 Squadron - that appeared in Over the Front a while back. It mentions the 22 July engagement Thorsten asked about.
Two days later, Captain Mellings scored two victories during the morning patrol. A two-seater fell near Ostend at 08h30 and fifteen minutes later, he crashed a Fokker D.VII one mile east of Ypres for his 15th. Mellings' successes that morning were quickly reversed during the evening patrol. Just before 6 pm, 210 attacked a formation of twelve German airplanes south-east of Ostend. Seven more Germans joined the fight and a large melee ensued. Captain Swales claimed a D.VII destroyed at 17h55 south of Ostend, but as the engagement broke up, Unger saw Capt. Mellings flying at 500 feet being closely pursued by three Germans. Leutnant Ludwig "Lutz" Beckmann of Jasta 56 claimed two Camels at 18h00 and 18h22 respectively as his 3rd and 4th victories. These were certainly Capt. Mellings in F'5914 and 2/Lt E.H. Bullen (USAS) in D'9626. Bullen was forced down and captured, but Mellings was KIA about 5 miles south of Ostend.
Not related to his early days, but hope it adds something...
Mike