Human continued to play for Berkshire until 1934, but meanwhile he had made his first-class debut, for Cambridge against Leicestershire at Fenner's in May 1930; his maiden wicket (and only one in the match) was that of Les Berry.
He played several more times for Cambridge that season, hitting 67 and taking 3–87 in an eventful match in late June against Surrey County Cricket Club: Thomas Shepherd made 234 out of 565 for Surrey, in reply to which Cambridge fell to 284/6 before a seventh-wicket partnership of 257 between Trevil Morgan and Freddie Brown gave the university a seven-run first-innings lead.
1931 saw Human turn out 11 times for Cambridge, but his performances tended to be rather disappointing: he passed fifty only once, making 67 against Leicestershire in June, though with the ball he did collect 21 wickets — the most he ever managed in a season — at a respectable average of 35.52.
That match marked the end of his first-class cricket for two seasons, though he continued to turn out fairly regularly for Berkshire, and made his only appearance for Oxfordshire against the touring Indians at Christ Church Ground, taking two wickets including that of captain K. S.
[5] Human's first-class career resumed in late June 1934, when he made his Worcestershire debut, against his old university, at Worcester, hitting 75 in the first innings.
All his remaining first-class games were for Worcestershire, for whom he continued to play a few times a season up until 1939; he was prevented from turning out more regularly by his position as a master at Bromsgrove School.