The answer to the problem of immigration is probably simple. There was a time when the great rivers of India did not follow their courses as they do now. This was most recently the case as regards the Indus and the rivers of Central India. In the days when there was no Indus delta and the Indus emptied itself into the great sandy depression of the Rann of Katch, another great lost river from the north-east, the Saraswati, fed the Indus, and between them the desert area was immensely reduced if it did not altogether disappear. Then, possibly, could the cairn-erecting stone-monument building Dravidian sneak his way along the west coast within sight of the sea, and there indeed has he left his monuments behind him. Otherwise the Dravidian element of Central Southern India could only have been gathered from beyond the seas; a proposition which it is difficult to believe. However, never since that desert strip was formed which now flanks the Indus to the east can there have been a right-of-way to the heart of India by the gateways of the west. The earliest exploration of these western roads, of which we can trace any distinct record, was once again due to the enterprise of the Greeks. We need not follow Alexander's victorious footsteps through India, nor concern ourselves with the voyage of his fleet down the Indus, and from the mouth of the Indus to Karachi. General Haig, in his pamphlet on the Indus delta, has traced out his route[3] with patient care, demonstrating from observations taken during the course of his surveys the probable position of the coast-line in those early days.
From Karachi to the Persian Gulf, a voyage undertaken 300 years B.C., of which a log has been kept from day to day, is necessarily of exceeding interest, if only as an indication of a few of the changes which have altered the form of that coast-line in the course of twenty-two centuries. This old route from Arabia to the west coast of India can hardly be left unnoticed, for it illustrates the earliest beginning of those sea ways to India which were destined finally to supplant the land ways altogether. I have already pointed out that, judged by the standard of geographical aptitude only, there is no great difficulty in reaching Persia from Karachi. But geographical distribution of mountain, river, and plain is not all that is necessary to take into account in planning an expedition into new territory. There is also the question of supplies. This was the rock on which Alexander's enterprise split. In moving out of India towards Persia he adopted the same principle which had stood him in good stead on the Indus, viz. the maintenance of communication between army and fleet. Naturally he elected to retire from India by a route which as far as possible touched the sea. This was his fatal mistake, and it cost him half his force.
We need not trouble ourselves further with the ethnographical conditions of that extraordinary country, Makran, in Alexander's time; nor need we follow in detail the changes which have taken place in the general configuration of the coast-line between India and the Persian Gulf during the last 2000 years, references to which will be found in the Journal of the Royal Society of Arts for April 1901. Apart from the enormous extension of the Indus delta, and in spite of the disappearance of many small islands off the coast, the general result has been a material gain by the land on the sea in all this part of the Asiatic coast-line.
Alexander left Patala about the beginning of September 326 B.C. to push his way through the country of the Arabii and Oritæ to Gadrosia (or Makran) and Persia. The Arabii occupied the country between Karachi and the Purali (or river of Las Bela), and the Oritæ and Gadrosii apparently combined with other tribes to hold the country that lay beyond the Purali (or Arabius). He had previously done all that a good general can do to ensure the success of his movements by personally reconnoitring all the approaches to the sea by the various branches of the Indus; by pacifying the people and consolidating his sovereignty at Patala so as to leave a strong position behind him entirely subject to Greek authority; and by dividing his force so as to utilize the various arms with the best possible effect. This force was comprised in three divisions; one under Krateros included the heavy transport and invalids, and this was despatched to Persia by a route which was evidently as well known in that day as it is at present. It is never contended by any historian that Alexander did not know his way out of India. On the contrary, Arrian distinctly insinuates that it was the perversity of pride, the "ambition to be doing something new and astonishing" which "prevailed over all his scruples" and decided him to send his crank Indus-built galleys to the Euphrates by sea, and himself to prove that such an army led by "such a general" could force a passage through the Makran wilderness where the only previous records were those of disaster. He had heard that Cyrus and Semiramis had failed, and that decided him to make the attempt.
We can follow Krateros no farther than to point out that his route was by the Mulla (and not the Bolan) Pass to Kalat and Quetta. Thence he must have taken the Kandahar route to the Helmund, and following that river down to the fertile and well-populated plains of lower Seistan (or Drangia) he crossed the Kirman desert by a well-known modern caravan route, and joined Alexander at or near Kirman; for Alexander was "on his way to Karmania" at the time that Krateros joined him, and not at Pura (the capital of the Gadrosii) as suggested by St. John. One interesting little relic of this march was dug up by Captain Mackenzie, R.E., during the construction of the fort on the Miri at Quetta. A small bronze figure of Hercules was brought to light, and it now rests in the Asiatic Society's Museum at Calcutta.
Alexander, as we have said, left Patala about the beginning of September. But where was Patala? Probably it was neither Hyderabad (as suggested by General Cunningham) nor Tatta (as upheld by other authorities), but about 30 miles S.E. of the former and 60 miles E.N.E. of the latter, in which locality, indeed, there are ruins enough to satisfy any theory. From Patala we are told by Arrian that he marched with a sufficient force to the Arabius; and that is all. But from Quintus Curtius we learn that it was nine marches to Krokala (a point easier of identification than most, from the preservation of the name which survived through mediæval ages in the Karak—the much-dreaded pirate of the coast—and can now be recognized in Karachi) and five marches thence to the Arabius. He started in cool monsoon weather. His route, after leaving Krokala, is determined by the natural features of the country as then existing. There was no shore route in these days. Alexander followed the subsequent mediæval route which connected Makran with Sind in the days of Arab ascendancy, a route that has been used as a highway into India for nearly eight centuries. It is not the route which now connects Karachi and Las Bela, but belongs to the later mediæval phase of history. As the sea then extended at least to Liari, in the basin of the Purali or Arabius, we are obliged to locate the position of his crossing that river as being not far south of Las Bela; where in Alexander's time it was "neither wide nor deep," and in these days is almost entirely absorbed in irrigation. This does not, I admit, altogether tally with the five marches of Quintus Curtius. It would amount to over a hundred miles of marching, some of which would be heavy, though not very much of it; but the discrepancy is not a serious one. The Arabius may have been far to the east of its present channel—indeed, there are old channels which indicate that it was so, and it does not follow that the river was crossed at the point at which it was struck. The reason for placing this crossing so far north is that room is required for subsequent operations. After crossing, we are told that Alexander "turned to his left towards the sea" (from which he was evidently distant some space), and with a picked force he made a sudden descent on the Oritæ. He marched one night only through desert country and in the morning came to a well-inhabited district. Pushing on with cavalry only, he defeated the Oritæ, and then later joining hands with the rest of his forces, he penetrated to their capital city. For these operations he must necessarily have been hedged in between the Purali and Hala range, which he clearly had not crossed as yet. Now we are expressly told by Arrian that the capital city of the Oritæ was but a village that did duty for the capital, and that the name of it was Rambakia. The care of it was committed to Hephæstion that he might colonize it after the fashion of the Greeks. But we find that Hephæstion certainly did not stay long there, and could only have left the native village as he found it, with no very extensive improvements.
It would be most interesting to decide the position of Rambakia. What we want to find is an ancient site, somewhere approaching the sea-coast, say 30 or 40 miles from the crossing of the Purali, in a district that might once have been cultivated and populous. We have found two such sites—one now called Khair Kot, to the north-west of Liari, commanding the Hala Pass; and another called Kotawari, south-west of Liari, and very near the sea. The latter has but recently been uncovered from the sand, but an existing mud wall and its position on the coast indicate that it is not old enough for our purpose. The other, Khair Kot, is an undoubted relic of mediæval Arab supremacy. It is the Kambali of Idrisi on the high-road from Armail (now Bela) to the great Sind port of Debal, and the record of it belongs to another history. Nevertheless, Khair Kot is exactly where we should expect Rambakia to be, and quite possibly where Rambakia was. Amongst the coins and relics collected there, there is, however, no trace of Greek inscription; but that this corner of the Bela district was once flourishing and populous there is ample evidence.
From Rambakia Alexander proceeded with half his targeteers and part of his cavalry to force the pass which the Gadrosii and Oritæ had conjointly seized "with the design of stopping his progress." This pass might either have been the turning pass at the northern end of the Hala, or it might have been on the water-parting from which the Phur River springs farther on. I should think it was probably the former, where there is better room for cavalry to act.
Immediately after defeating the Oritæ (who apparently made little resistance) Alexander appointed Leonatus, with a picked force, to support the new Governor of Rambakia (Hephæstion having rejoined the army), and left him to make arrangements for victualling the fleet when it arrived, whilst he pushed on through desert country into the territory of the Gadrosii by "a road very dangerous," and drawing down towards the coast. He must then have followed the valley of the Phur to the coast, and pushed on along the track of the modern telegraph line till he reached the neighbourhood of the Hingol River. We are indebted to Aristobulus for an account of this track in Alexander's time. It was here that the Phœnician followers of the army gathered their myrrh from the tamarisk trees; here were the mangrove swamps, and the euphorbias, which still dot the plains with their impenetrable clumps of prickly "shoots or stems, so thick set that if a horseman should happen to be entangled therewith he would sooner be pulled off his horse than freed from the stem," as Aristobulus tells us. Here, too, were found the roots of spikenard, so precious to the greedy Phœnician followers. These same products formed part of the coast trade in the days when the Periplus was written, 400 years later, though there is little demand for them now.
It was somewhere near the Hingol River that Alexander made a considerable halt to collect food and supplies for his fleet. His exertions and his want of success are all fully described by Arrian, as well as the rude class of fishing villages inhabited by Ichthyophagi, all the latter of which might well be cut out of the pages of Greek history and entered in a survey report as modern narrative. After this we have but slight indications in Arrian's history of Alexander's route to Pura, the capital of Gadrosia. Three chapters are full of most graphic and lively descriptions of the difficulties and horrors of that march. We only hear that he reached Pura sixty days after leaving the country of the Oritæ, and there is no record of the number of troops that survived. Luckily, however, the log kept by the admiral of the fleet, Nearkhos, comes into our assistance here, and though it is still Arrian's history, it is Nearkhos who speaks.