Dauntless

Here is 'Dauntless and the Poplar Pirates'

Dauntless and the Poplar Pirates"Look out, David!" Alex cried warningly. "They are throwing stones at
us." David ducked, then raised himself cautiously. There was a
ringing sound and a yell of triumph.
"Got it!" a voice shouted jubilantly.
"I will get it as well," another voice cried and a stone hit the
Dauntless's mainmast. David saw the attackers as a row of faces
showing over the edge of the bridge balustrade and arms upraised to
throw more stones.

The crew of the Dauntless, David, Bob, Alex and Tim , have sailed
their boat up the Thames and moored her in Bow Creek and they are not
at all pleased at this reception. But they discover the "Poplar
Pirates", as these local lads call themselves, are not really
vicious, just showing their resentment at being warned off the river
boats by the local bargees. The Pirates are all desperately keen on
boats, so David and his friends decide to offer them a trip in the
Dauntless. There is fog in the river and they rescue the
unfriendliest of the bargees when his Thames sailing barge gets
wrecked on a sandbank. The bargee, his wife and granddaughter Jenny
take refuge on the Dauntless, but the Pirates decide to salvage the
barge so they can have a boat of their own.

David is worried about the barge family whose home it is, and the
rest of the story tells of the exciting salvage of the barge and how
finally David extracts them all from a dramatic situation by his tact
and good seamanship.

Another in the series of exciting books about the Dauntless, with the
usual ingredients of a thrilling story and all the fun of sailing as
well as the interest of the details of life on a working sailing
barge in the late 1940-s.