chapter twenty-seven : `` an interesting dilemma '' upon their arrival in london , warthrop and arkwright had stopped by their hotel only long enough to drop their bags , and then they 'd split up-arkwright to dorset street in whitechapel to locate kearns 's flat and discover what , if any , clues he may have left behind ; warthrop to the royal london hospital to question kearns 's colleagues and interview the hospital director , the man responsible for overseeing kearns 's work .