Hi Rosina. Have you looked yet on the Scotland's People website (www.scotlandspeople.gov.uk) for Charlotte's death, probably between 1841 and 1851? I was going to check for you, but for some reason my login isn't working and I'll need to wait 3 days for them to get back to me. You'll need to register with the website. You have to pay to buy a record from there if you find one that you think might be right, but they have recently changed the site, and now, I think you can search and identify potential records for free. If Charlotte died before 1855 you will only be able to find a burial record, which sometimes don't have a lot of information on them. If she died from 1855 onwards, then the death certificates are very comprehensive with sufficient information for you to confirm it is definitely her. I checked on Ancestry, and none of the trees on there have Charlotte's death date.