You'd better think of something closer to hand, for I'll never Unriddle it.
"The Man from Jericho"
Edwin Carlile Litsey
He was endeavouring to Unriddle all this with a brain that was already somewhat muddled with alcohol, when Captain Green got up from his chair and standing over the Major spoke his last words for that night as from an oracle.
"The Duke's Children"
Anthony Trollope
Turning round at this point, I could see the house, and I moved a little aside into the underwood, and stood gazing at the windows, trying to Unriddle the matter.
"Historical Romances: Under the Red Robe, Count Hannibal, A Gentleman of France"
Stanley J. Weyman