Be wakeful and watchful, she heard Henry say. Make sure you are not the only member of your party who can write or read a letter. If you need to find water, follow a dog. If you are starving, eat insects before you waste your energy on hunting. Anything that a bird can eat, you can eat. Your biggest dangers are not snakes, lions, or cannibals; your biggest dangers are blistered feet, carelessness, and fatigue. Be certain to write your diaries and maps legibly; if you die, your notes may be of use to a future explorer. In an emergency, you can always write in blood