One afternoon she was shutting the door of the school behind her, and stepping out on the road skirting the green—the bedabbled wintry green—when she saw Robert emerging from the Mile End lane. She crossed over to him, wondering as she neared him that he seemed to take no notice of her. He was striding along, his wideawake over his eyes, and so absorbed that she had almost touched him before he saw her.

'Darling, is that you? Don't stop me, I am going to take the pony-carriage in for Meyrick. I have just come back from that accursed place; three cases of diphtheria in one house, Sharland's wife—and two others down with fever.'

She made a horrified exclamation.

'It will spread,' he said gloomily, 'I know it will. I never saw the children look such a ghastly crew before. Well, I must go for Meyrick and a nurse, and we must isolate and make a fight for it.'

In a few days the diphtheria epidemic in the hamlet had reached terrible proportions. There had been one death, others were expected, and soon Robert in his brief hours at home could find no relief in anything, so heavy was the oppression of the day's memories. At first Catherine for the child's sake kept away; but the little Mary was weaned, had a good Scotch nurse, was in every way thriving, and after a day or two Catherine's craving to help, to be with Robert in his trouble, was too strong to be withstood. But she dared not go backwards and forwards between her baby and the diphtheritic children. So she bethought herself of Mrs. Elsmere's servant, old Martha, who was still inhabiting Mrs. Elsmere's cottage till a tenant could be found for it, and doing good service meanwhile as an occasional parish nurse. The baby and its nurse went over to the cottage. Catherine carried the child there, wrapped close in maternal arms, and leaving her on old Martha's lap, went back to Robert.

Then she and he devoted themselves to a hand-to-hand fight with the epidemic. At the climax of it there were about twenty children down with it in different stages, and seven cases of fever. They had two hospital nurses; one of the better cottages, turned into a sanatorium, accommodated the worst cases under the nurses, and Robert and Catherine, directed by them and the doctors, took the responsibility of the rest, he helping to nurse the boys and she the girls. Of the fever cases Sharland's wife was the worst. A feeble creature at all times, it seemed almost impossible she could weather through. But day after day passed, and by dint of incessant nursing she still lived. A youth of twenty, the main support of a mother and five or six younger children was also desperately ill. Robert hardly ever had him out of his thoughts, and the boy's dog-like affection for the rector, struggling with his deathly weakness, was like a perpetual exemplification of Ahriman and Ormuzd—the power of life struggling with the power of death.

It was a fierce fight. Presently it seemed to the husband and wife as though the few daily hours spent at the rectory were mere halts between successive acts of battle with the plague-fiend—a more real and grim Grendel of the Marshes—for the lives of children. Catherine could always sleep in these intervals, quietly and dreamlessly; Robert very soon could only sleep by the help of some prescription of old Meyrick's. On all occasions of strain since his boyhood there had been signs in him of a certain lack of constitutional hardness which his mother knew very well, but which his wife was only just beginning to recognise. However, he laughed to scorn any attempt to restrain his constant goings and comings, or those hours of night-nursing, in which, as the hospital nurses were the first to admit, no one was so successful as the rector. And when he stood up on Sundays to preach in Murewell Church, the worn and spiritual look of the man, and the knowledge warm at each heart of those before him of how the rector not only talked but lived, carried every word home.

This strain upon all the moral and physical forces, however, strangely enough, came to Robert as a kind of relief. It broke through a tension of brain which of late had become an oppression. And for both him and Catherine these dark times had moments of intensest joy, points of white light illuminating heaven and earth. There were cloudy nights—wet, stormy January nights—when sometimes it happened to them to come back both together from the hamlet, Robert carrying a lantern, Catherine clothed in waterproof from head to foot, walking beside him, the rays flashing now on her face, now on the wooded sides of the lane, while the wind howled through the dark vault of branches overhead. And then, as they talked or were silent, suddenly a sense of the intense blessedness of this comradeship of theirs would rise like a flood in the man's heart, and he would fling his free arm round her, forcing her to stand a moment in the January night and storm while he said to her words of passionate gratitude, of faith in an immortal union reaching beyond change or death, lost in a kiss which was a sacrament. Then there were the moments when they saw their child, held high in Martha's arms at the window, and leaping towards her mother; the moments when one pallid sickly being after another was pronounced out of danger; and by the help of them the weeks passed away.

Nor were they left without help from outside. Lady Helen Varley no sooner heard the news than she hurried over. Robert, on his way one morning from one cottage to another, saw her pony-carriage in the lane. He hastened up to her before she could dismount.

'No, Lady Helen, you mustn't come here,' he said to her peremptorily, as she held out her hand.