After concluding his survey Rudolf walked briskly up the high flight of stone steps into the house.  Up two flights of the carpeted stairway he continued; and at its top paused.  The hallway there was dimly lighted by two pale jets of gas one—­far to his right, the other nearer, to his left.  He looked toward the nearer light and saw, within its wan halo, a green door.  For one moment he hesitated; then he seemed to see the contumelious sneer of the African juggler of cards; and then he walked straight to the green door and knocked against it.

Moments like those that passed before his knock was answered measure the quick breath of true adventure.  What might not be behind those green panels!  Gamesters at play; cunning rogues baiting their traps with subtle skill; beauty in love with courage, and thus planning to be sought by it; danger, death, love, disappointment, ridicule—­any of these might respond to that temerarious rap.

A faint rustle was heard inside, and the door slowly opened.  A girl not yet twenty stood there, white-faced and tottering.  She loosed the knob and swayed weakly, groping with one hand.  Rudolf caught her and laid her on a faded couch that stood against the wall.  He closed the door and took a swift glance around the room by the light of a flickering gas jet.  Neat, but extreme poverty was the story that he read.

The girl lay still, as if in a faint.  Rudolf looked around the room excitedly for a barrel.  People must be rolled upon a barrel who—­no, no; that was for drowned persons.  He began to fan her with his hat.  That was successful, for he struck her nose with the brim of his derby and she opened her eyes.  And then the young man saw that hers, indeed, was the one missing face from his heart’s gallery of intimate portraits.  The frank, grey eyes, the little nose, turning pertly outward; the chestnut hair, curling like the tendrils of a pea vine, seemed the right end and reward of all his wonderful adventures.  But the face was wofully thin and pale.

The girl looked at him calmly, and then smiled.

“Fainted, didn’t I?” she asked, weakly.  “Well, who wouldn’t?  You try going without anything to eat for three days and see!”

“Himmel!” exclaimed Rudolf, jumping up.  “Wait till I come back.”

He dashed out the green door and down the stairs.  In twenty minutes he was back again, kicking at the door with his toe for her to open it.  With both arms he hugged an array of wares from the grocery and the restaurant.  On the table he laid them—­bread and butter, cold meats, cakes, pies, pickles, oysters, a roasted chicken, a bottle of milk and one of red-hot tea.