Someone mentioned the runes above, I know them pretty well. I don't think they are a reference to Beowulf, but something entirely different, I think Charles is wishing Billy a good life, but I may just be interpreting them wrong. The runes are from the runic alphabet, Futhark. Tiwaz (the t looking one), Othala (o with two tails), and Gebo (the x below tiwaz).

I am going to paste some text here and then cite my source afterward. These are the meanings of those particular runes.

Othala: (O: Ancestral property.) Inherited property or possessions, a house, a home. What is truly important to one. Group order, group prosperity. Land of birth, spiritual heritage, experience and fundamental values. Aid in spiritual and physical journeys. Source of safety, increase and abundance. Othala Reversed or Merkstave: Lack of customary order, totalitarianism, slavery, poverty, homelessness. Bad karma, prejudice, clannishness, provincialism. What a man is bound to.

Tiwaz: (T: Tyr, the sky god.) Honor, justice, leadership and authority. Analysis, rationality. Knowing where one's true strengths lie. Willingness to self-sacrifice. Victory and success in any competition or in legal matters. Tiwaz Reversed or Merkstave: One's energy and creative flow are blocked. Mental paralysis, over-analysis, over-sacrifice, injustice, imbalance. Strife, war, conflict, failure in competition. Dwindling passion, difficulties in communication, and possibly separation.

Gebo: (G: Gift.) Gifts, both in the sense of sacrifice and of generosity, indicating balance. All matters in relation to exchanges, including contracts, personal relationships and partnerships. Gebo Merkstave (Gebo cannot be reversed, but may lie in opposition): Greed, loneliness, dependence, over-sacrifice. Obligation, toll, privation, bribery.

http://www.sunnyway.com/runes/meanings.html