se across the
street, opened, and a voice the young reporter knew was Grace's
called:

"Larry! Larry! Come here!"

He started to run across the thoroughfare, but, as he did so, he saw
another man emerge from behind a tree, next to the one where
Sullivan had been concealed. And, as the light from an arc lamp
gleamed on this man's face, Larry saw it was that of Mah Retto.

The young reporter paused, undecided what to do. Across the street
he could see Grace in the raised window, waiting for him--for what
he did not know. But, even as he looked at her, he saw Retto running
off down the street. In an instant Larry's mind was made up. He took
after Retto as fast as he could run.

CHAPTER XXII

GRACE IS SUSPICIOUS

Retto headed for Central Park, and as Larry saw him pass the
entrance he realized that it was going to be as hard to follow the
man as though he had disappeared in the midst of a crowd, especially
since the park was not well lighted.

"But I've got to follow him," thought Larry. "It's my best chance. I
must find out where he has moved to. I wonder what Grace wanted? And
I wonder what Sullivan's game was? My, but the questions are coming
too thick for me. I'll have to get an assistant."

By this time he had entered the park. Ahead of him he could hear the
running feet of the man he was pursuing. The big recreation ground
was almost deserted.

"I don't believe he dare run very fast," reasoned Larry, as he
slackened his pace. "If he does a policeman will be sure to stop him
and ask questions, and I guess Retto will not relish that. I have a
better chance than I thought at first. After all, I don't see why he
is so afraid of me. All I want to do is to ask him where he gets the
letters from Mr. Potter. He must know where the millionaire is
hiding, and it looks as if Mr. Potter had been in Retto's room at
the Jackson tenement, or else how would the envelope get there?
That's it! I'll bet the missing millionaire has been hiding with
this East Indian chap! I never thought of that until now!"

Having walked for fully a quarter of a mile Retto came to a sudden
stop, and so did Larry, hiding in the shadow of a tree. Retto
listened intently, and, of course, heard no pursuing footsteps. This
apparently satisfied him, for he proceeded more slowly.

"He thinks I've given up the chase," thought Larry. "I'll let him.
Maybe he'll go home all the quicker, and, after I learn where he is
stopping, I can go back