I have found the death registration for son Arthur. It confirms his parents as Thomas Mutch and Christain Newlands, both deceased at the time of Arthur's death.

It states that Arthur was a Shipmaster and died in Dundee. His father Thomas is stated to have been a Jute Mill mechanic. Details were given James Yule, son-in-law.

I have since found son Thomas' death registration which his father was a Factory Mechanic, but the writing is so difficult I can't read the son's occupation. It states he died single and the informant was John McLeod his brother-in-law.