Jarvice must share with Garratt Skinner--unless he preferred to abandon his scheme altogether; and that Mr.Jarvice would not do.
There was no other way.

Jarvice knew well that he could weaken Garratt Skinner's influence over Walter Hine by revealing to the youth certain episodes in the new friend's life.

He might even break the acquaintanceship altogether.

But Garratt Skinner would surely discover who had been at work.

And then?
Why, then, Mr.Jarvice would have upon his heels a shrewd and watchful enemy; and in this particular business, such an enemy Mr.Jarvice could not afford to have.