There was a light step behind him, and he was joined by the Duke.
"See anything," whispered the Duke and pushed a Colt into his hands.
"Nothing," said Hank, "he's gone."
Noiselessly they wriggled the garden length.
Hank made for the place where the ladder should have been, but his sweeping arm could not find it. Later it was discovered against the wall at the end of the garden.
Kymott Crescent is an offshoot of Kymott Road.
If you take the letter Y, the left fork to represent the Crescent, and the straight line and right fork to represent Kymott Road, you may realize the easier how the mysterious assassin escaped. For on the other side of the wall at the end of the Duke's garden is a main thoroughfare, deserted at this hour of the night, and it was as simple a matter to gain access to the garden as it was to escape from it.
They returned to Tuppy, a preternaturally solemn figure, sitting entrenched behind a divan which he had thoughtfully upended.
"He's gone," said the Duke cheerfully, but awoke no responsive gleam in Tuppy's eye.
"Oh, he's gone, has he?" said Tuppy absently.