<prompt> Translate the following text to EnglishAlikuwa nje utulivu, lakini mimi niliona mikono yake, ambayo kutoka nguvu ya muda mrefu ya tabia walikuwa mechanically straightening kuvuja vyombo juu ya fireplace-kipande, walikuwa kutetemeka vikali.  <response>: He was outwardly calm, but I noticed his hands, which from long force of habit were mechanically straightening the spill vases on the mantel-piece, were shaking violently. 