If she ever marries again,’ he said quietly, ‘it will be myself. But, Mark, is it possible you’ve never realised that, for her, your father is still as much alive as when he walked this earth? There’s a modest percentage of human beings so made, and a good few of them are Scots. For them there is actually neither death, nor separation. I believe your father still bars my way, as much as he did when—I first loved her. Of course ... I may exaggerate!’

‘Hope you do!’ Mark was deeply moved. ‘She doesn’t often speak of him to me.’

‘Nor to me. But—when she does, it’s quite clear.’

‘’M. Rough luck. All the same, if the worst happens, give me your word you’ll have a try ... for her sake and mine as well as your own. No one would dream there’s ten years between you.’

Keith simply held out his hand and Mark’s closed on it hard. The good understanding that had always existed between them was complete.

Mark found his mother writing letters in bed. He had accused her more than once of writing them in her bath. She looked strained and tired, as Keith said; but in her blue dressing-jacket, with hair demurely parted and a thick plait over her shoulder, she appeared younger, if anything, than the man he had left downstairs.

‘Incurable woman!’ he said lightly. ‘Who’s your victim this time?’

She told him; and while she read out snatches of her letter, Mark—watching her with new eyes—wondered, had she the least inkling? Would a word from him be of any service to Keith?

Curiosity impelled him to talk of the Boulogne trip, to enlarge on his confidence in Keith, and even to touch on the unconventional character of the whole plan. Neither in look nor tone could he detect a glimmer of after-thought or shadow of self-consciousness. The causes of her satisfaction were clear as daylight: longing to be in the same country as himself, candid pleasure in Keith’s and Sheila’s company, and her innate love of getting off the beaten track.

‘It’s just one of the many beautiful things that a genuine, understanding friendship makes possible,’ she concluded, stamping and sealing her letter: and Mark began to feel rather sorry for Keith. But he wisely refrained from any hint of his own knowledge. It would probably do no good and would certainly spoil her pleasure in going.