Father was worried half to death because she hadn't yet left Paigecourt.

Isn't it strange, Phil, that after all we're so near mother's old home?
And father was all against her going, I tell you, I'm worried." "She has probably gone by this time," observed Berkley.
The boy nodded doubtfully; then: "I had a fine letter from Ailsa.
She sent me twenty dollars," he added naively, "but our sutler has got it all." "What did Ailsa say ?" asked Berkley casually.
"Oh, she enquired about father and me--and you, too, I believe.
Oh, yes; she wanted me to say to you that she was well---and so is that other girl--what's her name ?" "Letty Lynden ?" "Oh, yes--Letty Lynden.

They're in a horrible kind of a temporary hospital down on the York River along with the Sisters of Charity; and she said she had just received orders to pack up and start west with the ambulances." "West ?" "I believe so." After a silence Berkley said: "I heard from her yesterday." "You did!" "Yes.

Unless your father already knows, it might be well to say to him that Ailsa's ambulance train is ordered to rendezvous in the rear of the 5th Provisional Corps head-quarters." "Our corps!" "That looks like it, doesn't it?
The 5th Provisional Corps is Porter's." He turned and looked back, out across the country.
"She may be somewhere out yonder, at this very moment, Steve." He made a vague gesture toward the west, stood looking for a while, then turned and walked slowly on with head lowered.
"I wish my mother and Ailsa were back in New York," said the boy fretfully.

"I don't see why the whole family should get into hot water at the same time." "It wouldn't surprise me very much if Ailsa's ambulance landed beside your mother's door at Paigecourt," said Berkley.