'It occurred to me, sir, that by telephoning to the nearest police-station—'

'Good heavens!' cried Mr Ferguson.

Two minutes later he replaced the receiver.

'It's all right,' he said. 'I've made them understand the trouble. They're bringing a ladder. I wonder what the time is? It must be about four in the morning.'

Master Bean produced a Waterbury watch.

'The time, sir, is almost exactly half past ten.'

'Half past ten! We must have been here longer than three hours. Your watch is wrong.'

'No, sir, I am very careful to keep it exactly right. I do not wish to run any risk of being unpunctual.'

'Half past ten!' cried Mr Ferguson. 'Why, we're in heaps of time to look in at the Savoy for supper. This is great. I'll phone them to keep a table.'

'Supper! I thought—'