Wogan avoided it; he kept again to the alleys and emerged before the Chevalier's lodging.

This he passed, but a hundred yards farther on he turned down a side street and doubled back upon his steps along a little byway between small houses.

The line of houses, however, at one point was broken by a garden wall.

Under this wall Wogan waited until a clock struck ten, and while the clock was still striking he heard on the other side of the wall the brushing of footsteps amongst leaves and grass.

Wogan tapped gently on a little door in the wall.