Sentence:  Written <WSD>evidence</WSD> that the claimant and any such attorney have agreed to the amount of the attorney 's fees shall be conclusive upon the Commission : Provided , however , That the total amount of the fees so agreed upon does not exceed 10 per centum of the total amount paid pursuant to the award . 
Meaning of the word marked with <WSD> tags:  (law) all the means by which any alleged matter of fact whose truth is investigated at judicial trial is established or disproved