He had, himself, declared that he was fast losing his sight.

And again, what was the bearing of his partial blindness on the will?
A totally blind man cannot draw up his will at all.

But if he has eyesight sufficient to enable him to write out and sign a will, mere defective vision will not lead him to muddle the provisions.

Yet something of this kind seemed to be in Thorndyke's mind, for now I recalled the question that he had put to the porter: "When you read the will over in Mr.Blackmore's presence, did you read it aloud ?" That question could have but one significance.

It implied a doubt as to whether the testator was fully aware of the exact nature of the document that he was signing.