Hi Barbara

Have you run the picture through Google images to see if there is a match?  I tried, but the scan was too small to get any useful results, but a higher resolution file might get better results.

You could also try this website - http://www.tartansauthority.com/tartan-ferret/ - if the search facility cannot identify the tartan, you could try emailing them a copy of the image to see if they can give you any help.