Usage examples for illegible

1. Into it he put some of the things that lay too deep for speech when he was with her, and because he had so much to say and therefore wrote extremely fast, a considerable portion of it was practically illegible.  The Breaking Point by Mary Roberts Rinehart

2. It bears some lines traced in a cramped, peculiar, and all but illegible hand.  The Insidious Dr. Fu-Manchu by Sax Rohmer

3. I could make nothing of the illegible smear in the corner, however, and so opened it, and read as follows:- Dear old Justin Martyr, I suppose you have about forgotten your old schoolfellow, Tom Temple, and it's natural you should; but he has not forgotten you.  Weapons of Mystery by Joseph Hocking