As is often the case with tales of great discovery, the details of how buried treasure came to be found beneath the rolling countryside of Pittsylvania County, Virginia, have grown a little gauzy over the last 30 years. But here is the story as the prospectors tell it. One day, in March 1979, a man named Byrd Berman, a geologist by training, was driving down a road through cattle pastures when the scintillometer sitting on the dashboard of his Hertz rental car began to beep.

Are representations of the Prophet Muhammad permitted in Islam? To make or not to make images of the Prophet: that is the question I will try to answer. It is an unexpectedly burning question, as the newspapers regularly demonstrate. But both the answer to the question and the reasons for raising it require a broader introduction.

There have been many times in recent years when one bemoaned the explosion of media that have provided public forums for so much incompetence and ignorance, not to speak of prejudice. Matters became worse after September 11, for two additional reasons. The first is the propagation of a climate of fear, of ever-present danger from ill-defined foes, which led in the West, and especially in the United States, to a plethora of security measures ranging from reasonable and useful to ridiculous and demeaning. Penetrating and perverting institutions and individuals, this fear collided in the Muslim world with a complex ideological and psychological evolution that led many people in Muslim countries and communities to a reflexive and often self-destructive brutality in reaction to the slightest whiff of verbal or visual provocation.

Gordon Brown has now been British prime minister for two years. This is hard to credit, partly because he has not fully emerged from the detachable Peter Pan shadow of Tony Blair, but mainly because he has not yet emerged from his own. He walks in a deep, impenetrable penumbra of his own making.