Along the range of these hills are many saints’ tombs, usually standing on some prominent point above the general level of the plateau. One of these was on a slight eminence somewhat higher than that first reached by us. Our escort, on this occasion limited to three soldiers, displayed great anxiety lest we should attempt to enter the _zaouia_, doubtless believing that our presence would profane the sanctity of the spot. We strained our eyes to make out as much as possible of the Great Atlas range from the vantage ground we had now attained; but the air was hazy towards the southern horizon. A faint outline was, indeed, distinctly traceable, and was sketched by Ball, but no details of any kind could be distinguished. We estimated the height of the hilly range, where we ascended it, at about 1,500 feet above our camp at Aïn el Hadjar, which we had found to be 504 feet above the sea-level. It is not likely that any part of the Djebel Hadid much exceeds the limit of 2,000 feet above the sea, but, in a range fully 25 miles in length, it is not possible to compare altitudes accurately by the eye. The _Cistus_ tribe was the chief ornament of the vegetation here; and it was interesting to observe that the species were to a great extent different from those that abound in the inland districts and on the lower slopes of the Atlas. _Cistus salviæfolius_ and _C. polymorphus_, both variable species, are common to this and the Atlas, although, strange to say, the latter widely-spread Mediterranean species has not been found in North Marocco. _Helianthemum virgatum_, hitherto seen everywhere on dry stony ground, was here wanting, as were _H. niloticum_ and the less common _H. glaucum_ and _H. rubellum_. In their places the top of the hill was in some places quite covered by large bushes of _H. halimifolium_ and _H. lavandulæfolium_, both laden with masses of bright yellow flowers. On the slopes we also found _H. canariense_, one of the very few species, not strictly confined to the coast, that are exclusively limited to the Canary Islands and South Marocco. Another rare species of the same genus, now first seen by us, was _H. Lippii_. This seems to have been originally a desert plant, the sole representative of the genus in the arid regions of Beloochistan, South Persia, and the Arabian desert, whence it has spread westward through Egypt to the skirts of the Sahara. Beyond its natural home, it has been found here and there, but rarely in Syria, Asia Minor, Sicily, and South-western Marocco, and may not improbably be detected in South-eastern Spain. Growing among the bushes on the upper part of the hill we found, in some abundance, the wild spiny form of the cultivated artichoke; whether truly indigenous, or carried hither by former inhabitants, it was impossible to decide.