It is quite interesting that the 1861 Census shows Neil as a "Miner of Nicol" but ten years later that he was a "Labourer in Powderworks" (presumably at the Lochfyne Powder Works) and then in 1881 a "Powder Maker" and then in 1891 "masons labourer employed".
Looks as though the 17 year old Catherine McArthur who was a servant in his house in 1851 was the same lady that Neil married sometime in 1860. Niel McGugan birth: 21 Apr 1817 christening: 27 Apr 1817 Parents Duncan McGugan, Cathrine McNiccol ..
Parents marriage date: 29 May 1810
groom's name: Duncan Macgugan
bride's name: Catharine Macnicol
Other children Mary Mcgugan christening: 30 Apr 1811
Alexander Mcgugan 11 Feb 1813
John McGugan birth: 03 Oct 1819 christening: 08 Oct 1819. Not sure why the family took a trip up to Uist c 1860