As far as informing the headmaster, harry had no idea where dumbledore went during the summer holidays. He amused himself for a moment, picturing dumbledore, with his long silver beard, full-length wizard's robes, and pointed hat, stretched out on a beach somewhere, rubbing suntan lotion onto his long crooked nose.
The four horsemen whose ride presages the end of the world are known to be death, war, famine, and pestilence. but even less significant events have their own horsemen. for example, the four horsemen of the common cold are sniffles, chesty, nostril, and lack of tissues; the four horsemen whose appearance foreshadows any public holiday are storm, gales, sleet, and contra-flow.