Via an email:
This is a myth. Sensational (and completely fictional) stories appeared in the popular Indian press during the autumn of 1928, to the effect that Lawrence was working for British Intelligence in Afghanistan. Evidently someone believed them and built a personal story around them. This isn't the only case in TEL's biography where a fictional press story generated what at first sight looks like supporting evidence. Likewise, there were countess press stories in the 1920s and 1930s about his alleged spying activities in different parts of the world. The stories even continued after he died, with foreign journalists claiming that his death had been faked.....