He shuffled forward into view, a small man with a dead white face

She jumped up and went to the outer office in search of the boy who, she faintly remembered, had erupted into her presence hours before with a request which she had granted without properly hearing. He was not in evidence. Evidently his petition had also been associated with the gnawing pangs which assail boyhood at one o'clock in the afternoon.
She was turning back to her office, undecided as to whether she should remain until his return or close the office entirely, when the shuffle of feet brought her round.
The outer office was partitioned from the entrance by a long "fence," the farther end of which was hidden by a screen of wood and frosted glass. It was from behind that screen that the noise came and she remembered that she had noted a chair there--evidently a place where callers waited.
"Eggscuse, mattam," said a wheezy voice, "I gall to eng-vire for Mister Peale, isn't it?"
He shuffled forward into view, a small man with a dead white face and a head of monstrous size.
She was bereft of speech and could only look at him, for this was the man she had found in her rooms the night before her dismissal--the man who carried the Green Rust.
"Mister Peale, he tolt me, I must gall him mit der telephone, but der nomber she vas gone oudt of mine head!"
He blinked at her with his short-sighted eyes and laid a big hairy hand on the gate.
"You must--you mustn't come in," she said breathlessly. "I will call Mr. Beale--sit--sit down again."
"Sch," he said obediently, and shuffled back to his chair, "dell him der Herr Brofessor it was."
The girl took up the telephone receiver with a shaking hand and gave the number. It was Beale's voice that answered her.
"There's a man here," she said hurriedly, "a--a--the man--who was in my room--the Herr Professor."
"I'm sorry," and if she could judge by the inflection of his voice his sorrow was genuine. "I'll be with you in ten minutes--he's quite a harmless old gentleman----"
She heard the "click" of his receiver and replaced her own slowly. She did not attempt to go back to the outer office, but waited by the closed door. She recalled the night, the terror of that unknown presence in her darkened flat, and shuddered. Then Beale, surprisingly sober, had come in and he and the "burglar" had gone away together.
What had these two, Mr. Beale and the "Herr Professor," in common? She heard the snap of the outer door