the 'original' is the parish reg - organised by date not name - there are several other lacunnae in the IoMFHSoc transcriptions of which Lawson is a retranscription - I 'redid' a number of periods (not all on my CD or online) for which the IoMFHSoc transcription is erroneous or missing. You need borrow the mormon films of the 1911 official copy or wait until the now iCentre opens sometime next year with digital images of the original register - I'd recommend the 1911 as the easiest route at present