From Quetta he returned to Kalat, and, determined to see as much of the borderland as possible, he made his return journey from Kalat to Sonmiani _via_ the Mulla Pass. The pass is still an interesting feature in Baluch geography. It was once the popular route from the plains to the highlands, when trade was more frequent between Kalat and Hindustan, and may serve a useful purpose again. Very few even of frontier officials know anything of it. Masson gives a capital description of the Mulla route, "easy and safe, and may be travelled at all seasons." From Jhal he went south through Sind to Sehwan, the antiquity of which place gives him room for much speculation; but from Sehwan to Sonmiani his route is not so clear. He started backwards on his tracks from Sehwan, then struck southward through lower Sind, passing on his way many ancient sites (locally known as "gôt," _i.e._ kôt, or fort), the origin of which he was apparently unable to determine, but halting at no place with a name that is still prominent, unless the modern Pokran represents his Pokar. I am not aware whether the "gôts" described by Masson in lower Sind have as yet been scientifically examined, but his description of them tallies with that of similar ruins lately found near Las Bela (especially as regards the stone-built circle), which, occurring as they do in Makran and the valley of the Purali (the ancient Arabis), are possibly relics of the building races of Arabs (Sab[oe]an or Himyaritic) who occupied these districts in early ages before they became withered and waterless with the gradual alteration of their geographical conditions. Other constructions, such as the cylindrical heaps on the hills, are more certainly Buddhist. Masson was unaware that he was traversing a province which figured as Bodh in Arab chronicles, and is full of the traces of Buddhist occupation. Makran, Las Bela, and the Sind borderland still offer a mine of wealth for archæological research. The last two or three days' march was in company with a Bulfut (Lumri) camel-man, whose mount was shared by Masson. As the Lumri sowar was in the habit not only of taking opium himself but of giving it to his camel, the morning's ride was sometimes perilously lively.