'Your brother advised me to come north,' Rob said, but Mary did not answer.

'I would not have done so,' he continued, 'if I had known that you knew why I stayed away from the house-boat.'

'I think I must ride on,' Mary said.

'No,' said Rob, in a voice that put it out of the question. So Mary must have thought, for she remained there. 'You thought it better,' he went on huskily, 'that, whatever the cause, I should not see you again.'

Mary was bending her riding-whip into a bow.

'Did you not?' cried Rob, a little fiercely.

Mary shook her head.

'Then why did you do it?' he said.

'I didn't do anything,' said Mary.

'In all London,' said Rob, speaking at a venture, 'there has not been one person for the last two months so miserable as myself.'