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"Her heart?" queried Blake, the physician. The transparent, porcelain quality of her skin would indicate that. But he found, as he watched, no nervous twitching, no look as of an incipient sack under her eyes; nor did the transparent quality seem waxy. There was, too, a certain pinkness in the porcelain which showed that her blood ran red and pure.

Then Mr. Blake and Dr. Blake re-fused into one psychology and decided that her appearance of delicacy was subtly psychological. It haunted him with an irritating effect of familiarity—as of a symptom which he ought to recognize. In all ways was it intertwined with the expression of her mouth. She had never smiled enough; therein lay all the trouble. She presented a very pretty problem to his imagination. Here she was, still so very young that little was written on her face, yet the little, something unusual, baffling. The mouth, too tightly set, too drooping—that expressed it all. To educate such a one in the ways of innocent frivolity!

When the porter's "last call for luncheon" brought that flutter of satisfaction by which a bored parlor-car welcomes even such a trivial diversion as food, Dr. Blake waited a fair interval for her toilet preparations, and followed toward the dining-car. He smiled a little at himself as he realized that he was craftily scheming to find a seat, if not opposite her, at least within seeing distance. On a long and lonely day-journey, he told himself, travelers are like invalids—the smallest incident rolls up into a mountain of adventure. Here he was, playing for sight of an interesting girl, as another traveler timed the train-speed by the mile-posts, or counted the telegraph poles along the way.

So he came out suddenly into the Pullman car ahead—and almost stumbled over the nucleus of his meditations. She was half-kneeling beside a seat, clasping in her arms the figure of a little, old woman. He hesitated, stock still. The blonde girl shifted her position as though to take better hold of her burden, and glanced backward with a look of appeal. The doctor came forward on that; and his sight caught the face of the old woman. Her eyes were closed, her head had dropped to one side and lay supine upon the girl's shoulder. It appeared to be a plain case of faint.

"I am a physician," he said simply, "Get the porter, will you?" Without an instant's question or hesitation, the girl permitted him to relieve her, and turned to the front of the car. Other women and one fussy, noisy man were coming up now. Dr. Blake waved them aside. "We need air most of all—open that window, will you?" The girl was back with the porter. "Is the compartment occupied? Then open it. We must put her on her back." The porter fumbled for his keys. Dr. Blake gathered up the little old woman in his arms, and spoke over his shoulder to the blonde girl:

"You will come with us?" She nodded. Somehow, he felt that he would have picked her from the whole car to assist in this emergency. She was like one of those born trained nurses who ask no questions, need no special directions, and are as reliable as one's instruments.

The old woman was stirring by the time he laid her out on the sofa of the compartment. He wet a towel in the pitcher at the washstand, wrung it out, pressed it on her forehead. It needed no more than that to bring her round.

"Only a faint," said Dr. Blake; "the day's hot and she's not accustomed to train travel, I suppose. Is she—does she belong to your party?"

The girl spoke for the first time in his hearing. Even before he seized the meaning of her speech, he noted with a thrill the manner of it. Such a physique as this should go with the high, silvery tone of a flute; so one always imagines it. This girl spoke in the voice of a violin—soft, deep, deliciously resonant. In his mind flashed a picture for which he was a long time accounting—last winter's ballet of the New York Hippodrome. Afterward, he found the key to that train of thought. It, had been a ballet of light, shimmering colors, until suddenly a troop of birds in royal purple had slashed their way down the center of the stage. They brought the same glorified thrill of contrast as this soft but strong contralto voice proceeding from that delicate blondness.

"Oh, no!" she said, "I never saw her before. She was swaying as I came down the aisle, and I caught her. She's—she's awake." The old woman had stirred again.

"Get my bag from seat 12, parlor-car," said Dr. Blake to the porter. "Tell them outside that it is a simple fainting-spell and we shall need no assistance." Now his charity patient had recovered voice; she was moaning and whimpering. The girl, obeying again Dr. Blake's unspoken thought, took a quick step toward the door. He understood without further word from her.

"All right," he said; "she may want to discuss symptoms. You're on the way to the dining-car aren't you? I'll be along in five minutes, and I'll let you know how she is. Tell them outside that it is nothing serious and have the porter stand by—please." That last word of politeness came out on an afterthought—he had been addressing her in the capacity of a trained nurse. He recognized this with confusion, and he apologized by a smile which illuminated his rather heavy, dark face. She answered with the ghost of a smile—it moved her eyes rather than her mouth—and the door closed.

After five minutes of perfunctory examination and courteous attention to symptoms, he tore himself away from his patient upon the pretext that she needed quiet. He wasted three more golden minutes in assuring his fellow passengers that it was nothing. He escaped to the dining car, to find that the delay had favored him. Her honey-colored back hair gleamed from one of the narrow tables to left of the aisle. The unconsidered man opposite her had just laid a bill on the waiter's check, and dipped his hands in the fingerbowl. Dr. Blake invented a short colloquy with the conductor and slipped up just as the waiter returned with the change. He bent over the girl.

"I have to report," said he, "that the patient is doing nicely; doctor and nurse are both discharged!"

She returned a grave smile and answered conventionally, "I am very glad."

At that precise moment, the man across the table, as though recognizing friendship or familiarity between these two, pocketed his change and rose. Feeling that he was doing the thing awkwardly, that he would give a year for a light word to cover up his boldness, Dr. Blake took the seat. He looked slowly up as he settled himself, and he could feel the heat of a blush on his temples. He perceived—and for a moment it did not reassure him—that she on her part neither blushed nor bristled. Her skin kept its transparent whiteness, and her eyes looked into his with intent gravity. Indeed, he felt through her whole attitude the perfect frankness of good breeding—a frankness which discouraged familiarity while accepting with human simplicity an accidental contact of the highway. She was the better gentleman of the two. His renewed confusion set him to talking fast.

"If it weren't that you failed to come in with any superfluous advice, I should say that you had been a nurse—you seem to have the instinct. You take hold, somehow, and make no fuss."

"Why should I?" she asked, "with a doctor at hand? I was thinking all the time how you lean on a doctor. I should never have known what to do. How is she? What was the matter?"

"She's resting. It isn't every elderly lady who can get a compartment from the Pullman Company for the price of a seat. She was put on at Albany by one set of grandchildren and she's to be taken off at Boston by another set. And she's old and her heart's a little sluggish—self-sacrifice goes downward not upward, through the generations, I observe—though I'm a young physician at that!"

Her next words, simply spoken as they were, threw him again into confusion.

"I don't know your name, I think—mine is Annette Markham."

Dr.