‘We seem to do a prodigious amount of walking in London,’ he observed.

‘Do you not walk much in Guernsey, then?’ Sarnia asked.

‘That we do,’ he chuckled. ‘And climb as well. Our town is built on the side of a steeper hill than I have found here. And our pavements, of Guernsey granite, are as hard. No, I must put my fatigue down to nothing but my good lady’s resolve not to miss a single pleasure London can afford.’

‘He is worse than I,’ Mrs Jelain said. ‘We have already been twice around the Crystal Palace, and he plans a third visit tomorrow.’

‘It is a Shilling Day, which will be a great economy.’

Mrs Jelain shook her head indulgently. ‘You can go by yourself to your Shilling Day. I will take a hackney coach to Bond Street, and more than make up for your economies.’

He roared his laughter. ‘I dare swear you will!’