All I meant to ask was this.

Why--even supposing he did take the Diamond--should Franklin Blake make himself the most prominent person in the house in trying to recover it?
You may tell me he cunningly did that to divert suspicion from himself.

I answer that he had no need to divert suspicion--because nobody suspected him.
He first steals the Moonstone (without the slightest reason) through natural depravity; and he then acts a part, in relation to the loss of the jewel, which there is not the slightest necessity to act, and which leads to his mortally offending the young lady who would otherwise have married him.

That is the monstrous proposition which you are driven to assert, if you attempt to associate the disappearance of the Moonstone with Franklin Blake.

No, no, Miss Clack! After what has passed here to-day, between us two, the dead-lock, in this case, is complete.
Rachel's own innocence is (as her mother knows, and as I know) beyond a doubt.