170 SURVEYING AND EXPLORING IN SIAM.
fields, though the people depended chiefly on the mountain' ^ cultivation. I paid off the men from Muang Sai, and the next daj a small boat, went down the Nam Nga. At some points 011 the r^e*a as my guide told me, attempts were made to find salt, and traces it were discovered. In the interior of Indo-China, far from the ' a bed of salt is a great treasure, and salt localities are well known*