Catherine Mctavish (nee Mcarthur) was still around in 1901:
Skipness Village, Skipness, Argyll
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Catherine McTavish, 81, b. Skipness
Catherine Paterson,daughter, 49, b. Skipness
Catherine McArthur McGillivray, grddaur, 15, b. Glasgow
Donald Hector Russell, grdson, 6 , b. Glasgow
Nearest that I can get to Catherine's baptism is:
Baptism Saddell and Skipness 8 Jan 1820
Katherin McArthur
Parents - Hector McArthur and Meran Carmichal
Gadget