Historical Love Letter (Mark Twain)

May 12, 1869
Out of the depths of my happy heart wells a great tide of love and prayer for this priceless treasure that is confided to my life-long keeping.
You cannot see its intangible waves as they flow towards you, darling, but in these lines you will hear, as it were, the distant beating of the surf.
Mark Twain (Samuel Langhorne Clemens), American writer, to Olivia Langdon, his future wife.