Sentence:  Fortunately , the honor of the denomination can <WSD>attest</WSD> that Cyrus Bartol defended Parker 's sincerity , as did also Gannett and Chandler Robbins ; whereupon Parker broke down into convulsions of weeping and rushed out of the room , though not out of the Fellowship . 
Meaning of the word marked with <WSD> tags:  provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes