You also need to consider the arcane selection systems that were in place many years ago - the batsmen weren't always facing the best bowlers!
EG: Ultimately, it is difficult to avoid the conclusion that Jackson's omission was partly due to snobbery. Derbyshire was an unfashionable county; Jackson was a coal miner. His biographer, Mike Carey, lays the blame at the door of Freddie Brown and Gubby Allen.
Brown, who captained England in 1949, 1950 and 1951, apparently decided that Jackson lacked the stamina to come back for a second spell - a ludicrous criticism of a man who would bowl an average of 886 overs a season between 1949 and 1963.
Gubby Allen, an Old Etonian who played in 25 Tests but never took 100 wickets in a season (a feat Jackson achieved 10 times), was chairman of the Test selectors from 1955 to 1961, when Jackson was at his peak. "My information is," Fred Trueman observed, "that he [Allen] would not have Les at any price and if that's true it's criminal." Even when Jackson played against the Australians in 1961, it was at Peter May's insistence.
Tom Graveney, reflecting that RWV Robins played 19 times for England against Jackson's twice, called this discrepancy "sacrilege". But Jackson himself never complained, either privately or in print. For him, playing cricket at any level was preferable to working in the pits.
Trevor Bailey wrote that professionals around the country were aghast when John Warr, of Cambridge University and Middlesex, was preferred to Jackson for the 1950-51 trip to Australia.
Don Bradman, who batted against him in 1948, the day after his 173 not out in the Headingley Test had won the Ashes for Australia, reckoned he was one of the best bowlers he encountered on that year's tour; while Freddie Trueman rated him "the best six-days-a-week bowler I ever saw in county cricket."