The inside was lined with an off-cut of wallpaper. As it's going to be a flow-type journal, which will hold papers, envelopes etc. for the recipient to use in her own journal making, I decided to use elastic cord to hold the contents in. I made an inside spine and tied the elastic round that so it wasn't visible on the outside and trimmed it with Washi tape.
Here's the finished journal, stuffed full of goodies!