I assume that, since your title says 1843-1918, that these are his dates of birth and death, and therefore that you already have the relevant baptism record and death certificate?
Also that you have found him in the 1851, 1861, 1871, 1881, 1891 and 1911 censuses, and are only missing him in 1901?
I take it that he was the James Wood married to Christina Mackenzie, parents of at least 12 children (according to LIBINDX
http://libindx.moray.gov.uk/people/mainfilter.asp )