Wow Monica, I am overwhelmed by the help you are giving me on this..... Thank you so much!
I have just had a look on Scotlands People and found a will for Alison Scott nee Shiels so I'm going to purchase it!
Here are the details of the 1881 Census:-
Thomas SCOTT, 56, b. Edinburgh, Warehouseman, (Soft Goods)
Allison I SCOTT, 30, b. Glasgow
Helen I SCOTT, 28, b. Glasgow
Agnes G SCOTT, 26, b. Glasgow
Isabel SCOTT, 24, b. Glasgow
Thomas SCOTT, 15, b. Glasgow
Galbella SHIELS, 84, Aunt, b. Dalkieth, Annuitant
Bella McMILLAN, 24, Servant, b. Lochmaddy Inverness
I wonder what happened to Alison on this Census. According to the Wills she died in 1886.
I had a look at that Minister website. I think that James may have been Ordained 20 years or so before he died. So he probably had another occupation before that. Interestingly, On the Banns for Thomas & Agnes's marriage it says that he is a Manufacturer. Maybe he took over his fathers business when he became a minister.

I'll go and have a wee look at that will.......
Melonsmum