‘Have you—seen—’ she began imploringly.

Swithin sighed, lowered his thoughts to sublunary things, and told briefly the story of his journey. Sir Blount Constantine was not in London at the address which had been anonymously sent her. It was a mistake of identity. The person who had been seen there Swithin had sought out. He resembled Sir Blount strongly; but he was a stranger.

‘How can I reward you!’ she exclaimed, when he had done.

‘In no way but by giving me your good wishes in what I am going to tell you on my own account.’ He spoke in tones of mysterious exultation. ‘This parcel is going to make my fame!’

‘What is it?’

‘A huge object-glass for the great telescope I am so busy about! Such a magnificent aid to science has never entered this county before, you may depend.’

He produced from under his arm the carefully cuddled-up package, which was in shape a round flat disk, like a dinner-plate, tied in paper.

Proceeding to explain his plans to her more fully, he walked with her towards the door by which she had emerged. It was a little side wicket through a wall dividing the open park from the garden terraces. Here for a moment he placed his valise and parcel on the coping of the stone balustrade, till he had bidden her farewell. Then he turned, and in laying hold of his bag by the dim light pushed the parcel over the parapet. It fell smash upon the paved walk ten or a dozen feet beneath.

‘Oh, good heavens!’ he cried in anguish.

‘What?’