Memorial Garden

My cousin, who was 25, was tragically killed this past year. Instead of buying flowers for the funeral I decided to have a small garden in my back yard with various name daylilies that reminded me of her. I wrote a poem for the funeral and would like to have that as a part of my garden. How can I preserve it so the weather doesn't ruin it? You guys are all so great so I know someone will have an idea. Thanks for your help.