You might equally have asked us to prove that Julius Caesar existed without making any reference to works of antiquity...
Coin of Julius Caesar found at Hamlin Lane allotments
This silver denarius of Julius Caesar of 54-51 BC was dug up in Mr Webber’s allotment at Hamlin Lane in 1956. It was minted in Gaul, and shows (just visible) an elephant standing above the word CAESAR; the reverse shows the sacred implements used in sacrifice.
Such coins were still in circulation in the mid and late first century, and are more likely to reflect activity at that time, rather than in Caesar’s time, when Britain was outside the Roman empire.
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