Despite their failure to locate any tangible clue to Dhugal's whereabouts.

The banks and trust companies where Kemper kept his money afforded no tangible clue.

The artist provokes curiosity and invites speculation without offering tangible clues to interpretation.

Reaching Room 812, The Shadow came upon a tangible clue: the odor of stale tobacco.

If Father Baddeley wanted him to act he would have to provide more tangible clues than a missing diary and a broken lock.

When the map failed to give a tangible clue, he turned to the subject of criminals themselves.

Now finally there was a tangible clue.

She has no memories, and the only tangible clue is the word Theresia scribbled upon a piece of paper.

It was a slim chance, a pitiful hope, but it was the first tangible clue that had been offered her.

Curry's misery lay in the fact that his master had left no tangible clue to the murderer's identity.