Where does the title come from?

Anonymous, in a generous comment yesterday, asks where the title Setting the Desert on Fire comes from. It is taken from page 67 of Seven Pillars of Wisdom (1935 edition). Here is the full quote in context below:

"The Sherif's rebellion had been unsatisfactory for the last few months (standing still, which, with an irregular war, was the prelude to disaster), and my suspicion was that its lack was leadership: notintellect, nor judgement, nor political wisdom, but the flame ofenthusiasm that would set the desert on fire."