Downstream

report says his five-hour
swim was from Southend to
Sheerness, another that on his
third attempt he ‘successfully
swam across the estuary from
Sheerness to Westcliff . . .
starting on the Kent side he
had 500 yards’ expanse of
mud to walk’ and ended at
the Southend swimming bath.
So perhaps Derham tried it in
both directions.
Either way, his stated aim
now was to beat Montague