Here are some high-res scans of vintage French postcards with gorgeous handwriting in old ink. To use them in your work, click on an image for a bigger view then click, copy, and save into an editing program such as Paint. You can then add a light card for some backing and hey presto, you can play around with them to your creative heart’s content.
And here is a video tutorial showing how to use vintage postcards to make pockets in an altered book. This technique would also be good in junk journals or art journals or other mixed media work. Please let me know if you have any questions!