“It is not necessary; but it is advisable.  It is for his sake that I asked.  My friend is an old man, and it might concern him unduly—­even alarm him.  I promise you there shall be nothing that could cause him anxiety in our silence, or at which he could take umbrage.”

“Go on, sir!” said Adam simply.

“You see, your uncle is now an old man.  I know it, for we were boys together.  He has led an uneventful and somewhat self-contained life, so that any such condition of things as has now arisen is apt to perplex him from its very strangeness.  In fact, any new matter is trying to old people.  It has its own disturbances and its own anxieties, and neither of these things are good for lives that should be restful.  Your uncle is a strong man, with a very happy and placid nature.  Given health and ordinary conditions of life, there is no reason why he should not live to be a hundred.  You and I, therefore, who both love him, though in different ways, should make it our business to protect him from all disturbing influences.  I am sure you will agree with me that any labour to this end would be well spent.  All right, my boy!  I see your answer in your eyes; so we need say no more of that.  And now,” here his voice changed, “tell me all that took place at that interview.  There are strange things in front of us—­how strange we cannot at present even guess.  Doubtless some of the difficult things to understand which lie behind the veil will in time be shown to us to see and to understand.  In the meantime, all we can do is to work patiently, fearlessly, and unselfishly, to an end that we think is right.  You had got so far as where Lilla opened the door to Mr. Caswall and the negro.  You also observed that Mimi was disturbed in her mind at the way Mr. Caswall looked at her cousin.”

“Certainly—­though ‘disturbed’ is a poor way of expressing her objection.”

“Can you remember well enough to describe Caswall’s eyes, and how Lilla looked, and what Mimi said and did?  Also Oolanga, Caswall’s West African servant.”

“I’ll do what I can, sir.  All the time Mr. Caswall was staring, he kept his eyes fixed and motionless—­but not as if he was in a trance.  His forehead was wrinkled up, as it is when one is trying to see through or into something.  At the best of times his face has not a gentle expression; but when it was screwed up like that it was almost diabolical.  It frightened poor Lilla so that she trembled, and after a bit got so pale that I thought she had fainted.  However, she held up and tried to stare back, but in a feeble kind of way.  Then Mimi came close and held her hand.  That braced her up, and—­still, never ceasing her return stare—­she got colour again and seemed more like herself.”

“Did he stare too?”