I'm not sure if I can reply to each of your answers seperately so:
Kay99 - thanks, I missed that on your last message, saw it after I'd replied. That date would definitely fit better. I think I've found Helen in the census, unfortunately there is a Helen Hutson domestic servant in Glasgow and a Helen Hoodson farm servant in Melrose. Of the two I think the Helen Hoodson the more likely a) because she comes from an agricultural family and b) becuase she would be unlikely to meet James in Glasgow as far as I know. It's possible that Elizabeth Hutson could be a 'Betty' or 'Betsy' in the census, or something similar? I've never managed to track her down but it's always possible I've missed something. Unfortunately as I haven't been able to track down any of James' siblings I don't know if he had a cousin James either, there were rather a lot of James Keddies in the census. (Can't you just see the next query that will be going up?
)
Emma - thanks for the reply. Yes that's them. From 1851 on they're very easy to find in general, there are so many of them. I have two birth certificates, one for 1856 and one for 1858 but neither has a marriage date on, just the parent's names. I've noticed before that none of my very early certificates have marriage dates, I always assumed that they only started doing that after a certain date. Maybe some registrars were just late in getting the memo