"Where they generally are; over in Mrs. Hoyt's room 'ca'y'in on' as Mitty would say."
The doctor picked up his hat. "After all, it was only that the girl was thinking about her work," he told himself. He knew she was practicing for a musicale which was to be given by Frau Burg-Schmidt's pupils, and that she had much to do. He was about to go when he turned back. "Listen, Nan," he said. "Who is the German youth with the green cap I saw skating with your friend Jo, this afternoon?"
"Were you out there? Oh, he is a friend of Jo's." She tried to speak lightly.
"Do you know him?"
Nan was silent, but the question was too direct to avoid. "No," she answered truthfully, then hurriedly, "Why do you ask?"
"Because I don't believe he is the kind you all want to know."
"What makes you think so?"
"Well, I'll tell you the whole thing. I was standing with a fellow student watching the skaters when Miss Jo swung along with Green-Cap. She saw me and I bowed. I don't think she saw my friend who was just behind me. 'Who is that?' said he. 'A young compatriot of ours,' I told him. 'Nice girl.' 'Humph!' he said. 'I wonder where she picked up that fellow.' 'What's the matter with him?' I asked. 'He is a bad lot,' said my friend. 'I shouldn't like a sister of mine to be seen with him.' Later on I happened to be coming home directly behind the couple. They were laughing and talking in great shape. I noticed that none of you were along, and I wondered; that's all."
Nan stood leaning on the back of a chair, listening thoughtfully. "Sit down, Dr. Paul," she said. "I don't believe I shall have to write that letter to-night, for you happen to bring up the very subject I was going to write about. No, we don't know that young man. He is a chance acquaintance whom Jo has picked up without realizing it was anything out of the way. He asked if he might skate with her, and she, thinking it the custom, accepted his invitation. Mary Lee, whom you know is always a most proper and discreet young person, came away and left Jo. Mrs. Hoyt believing him to be a friend of ours hasn't inquired about him. She is an awfully jolly sort of somebody, and is really particular, but I think she doesn't want to appear fussy, and of course doesn't dream but that we all know this person. So, Jo has been going her own gait, and I am awfully bothered about it. I don't want to tell tales to Mrs. Hoyt, and have her annoyed with Jo. I don't want to tell Fräulein Bauer, for fear she would say Jo could not stay here, for the Fräulein is a great stickler of proprieties, and I could see nothing to do but to write to mother, though I hate to bother her."
The doctor looked down at her with a sympathetic expression in his dark eyes. "You are always shouldering somebody's burdens, Nan," he said. "I haven't forgotten last year."