<prompt> Translate the following text to EnglishJapp kisha alitoa kipande cha karatasi kilichokuwa kimeharibika kilichopatikana kwenye gridi, na hii, pamoja na ugunduzi wa ndevu katika ghorofa ya juu, ilikamilisha ushahidi wake.  <response>: Japp then produced the charred fragment of paper recovered from the grate, and this, with the discovery of the beard in the attic, completed his evidence. 