Henry Malcolm and Henry Malkin are the same person. I have the marriage certificate of Henry Malkin and Elizabeth Davis. A birth certificate of Henry's son William shows the parents as Henry (a publican's manager) and Elizabeth Burtwell, formerly Davis. Whilst the marriage of their son, some twenty years later shows the father to be Henry Malcolm Burtwell (publican). Also, on William's marriage certificate it shows his residene as 70 Pages Walk at the time of marriage, and I have the death certificate for Elizabeth Burtwell (nee Davis) formerly of 70 Pages Walk in 1909, and earlier, in 1906 I have the death certificate of Henry Malcolm Burtwell, aged 45 residence at 68 Pages' Walk. Whilst I cannot explain the difference between the spellings of Henry Malcolm and Henry Malkin, it must be the same person based on the other evidence I have. I know I am reviving an old post here, and you may have uncovered this yourself, but if not I hope this has helped.