The number of slaves in this city is from eight hundred to one thousand. It is difficult to ascertain any thing like the exact number, the opulent Moors having many negress slaves, with whom they live in a state of concubinage. Young, rich, and fashionable Moors, I was told for the first time in a Mahommedan country, have become disgusted with the old habit of managing and taking a wife early, and adopt the immoral practice of buying female slaves, by which they avoid, as they say, the trouble and expense of marrying females of their own rank in Moorish society. A good Mussulman must however, marry once in his life. Slaves are imported viâ Wadnoun from Timbuctoo and Soudan, and even from the western coast. Negroes of the Timbuctoo market are more esteemed than those of Guinea, being a stronger and more laborious race. The common price of a slave in Mogador is from 60 to 90 ducats; one day a beautiful African girl, freshly exported from the interior, was sold for 160 ducats, or about £20 sterling. This is considered an extraordinary high price. Slaves are sold by criers about the streets in Morocco, and most towns, and not in bazaars, as in the East. But the most remarkable feature of slavery in this part of the world, is the Christian or European slavery carried further south, in the regions extending on the line of coast below Wadnoun, and the adjacent Sahara. Something like a regular system of Christian slavery is there going on, whilst its head-quarters are not more than five or six days' journey from this residence of the European Consuls. This white slavery consists in seizing shipwrecked sailors, numbers being fishermen from the Canary Islands. We know little about these poor captives, although we are so near Wadnoun, and are continually trading with Sous and this country. Mr. Davidson casually mentions them in his journal. It is a settled and religious practice of merchants to keep Europeans ignorant of the south and the Desert; we only hear of these captives now and then, when one escapes, and after being bought and sold by a hundred different masters, is fortunate enough to be redeemed; of his companions in shipwreck, the escaped captive rarely knows anything. They are gone: they are either drowned near the coast, plundered and massacred, or carried far away into the Desert, and perhaps for ever. Formerly vessels navigated through the channel (if it may be so called) of the Canary Islands and the Wadnoun coast, by which they often got on shoal water, and were cast away; in this manner, whites were enslaved. Happily now, masters of vessels have become acquainted with this dangerous coast. They pass to the east of the Canaries, and fewer vessels are shipwrecked hereabouts.