`What did you do?'

`Nothing. I was too startled.'

`Did you chase the man?'

`And look a fool? Good God! No.'

`So naturally; said Dr Fell, `you didn't report it. Did you catch a glimpse of the man?'

`No. It was too sudden, I tell you. Flick, and it was gone. Ha. Damn him. And now…. You see,' Sir William muttered, hesitantly, turning his head from, side to side `you see… Never mind the hat; I'm thinking about Philip. I never treated him as I should, I was as fond of him as a son. But I always acted the Dutch uncle. Kept him on a starvation allowance, always threatened to cut him off, and always told him how worthless he was. I don't know why I did it, but every time I saw that boy I wanted to preach. He had no idea of the value of money'

The limousine slid among red houses, and street lamps, made pale gleams through its windows in a canopy of mist. Emerging from Mark Lane, it swerved round the Monument and descended Tower Hill.

Rampole could see nothing more than a few feet ahead. Lamps winked in smoky twilight, and the immensity which should have been the river was full of short, sharp whistle blasts answered by deeper hootings from a distance.

When the limousine passed through the gate in the rails surrounding the whole enclosure, Rampole tried to rub the blur from the window to peer out. Vaguely he saw a dry moat paved in white concrete, with a forlorn hockey-net near the middle. The drive swung to the left, past a frame building he remembered as the ticket-office and refreshment room, and under an arch flanked by low, squat round towers. Just under this, arch they were brought up short. A sentry, in the high black shako and grey uniform of the Spur Guard, moved out smartly and crossed his rifle on his, breast. The limousine slithered to a halt and Hadley sprang out.

In the dim, ghostly half-light another figure emerged at the sentry's side. It was one of the Yeoman Warders, buttoned up in a short blue cloak and wearing the red-and-blue Beefeater hat. He said: