From reading the first chapter of the "Pittsburgh tour" book, I noticed that he didn't know whether father or son Russell was the first to be married to an Ackley sister.
Probably you will know it, but if not, see the webpage
and you will find the contents of the 1880 Unite States census for C. T. Russel (sic).
He is married to Marie F Russell, his father lives in his house as Russel J. L. Russel (sic). And E H Ackly, single.
So the son married definitely first, and the father after the 1880 census.