Educated firstly at King's College Choir School and then won a foundation scholarship to Marlborough College (C3) in 1906 and won a Junior Scholarship the following year. He left in the summer of 1912 having been Head Boy and gained a Classical Scholarship to St John's College, Cambridge. He was photographed as a member of the Eagles Society at St John's in 1914.
Robert was commissioned into The Rille Brigade in November 1914 and was serving with the 2nd Bn when he was killed in action on 9th September 1915 in Flanders. The Officer Commanding his division wrote as follows "Your son had done excellent work whilst serving this division, and was a most promising officer. You have every reason to be proud of his gallantry and devotion to duty. H HUDSON, Major General, Commanding 8th Division."
He is commemorated in the Memorial Hall at Marlborough and in the church at Earls barton.
Another memorial in the church at Hitcham reads as follows:
In loving memory of Robert Wanklyn Cobbold, St John's College, Cambridge, Lieut. 2nd Battn. The Rifle Brigade, Killed in Action Sept. 9th 1915. Resting at Fleurbaix, Aged 22years.
Blessed are the pure in Heart.
With assistance from the archivist at Marlborough College.