"The mob of fanatical Moslems would have killed him," was the reply. "They would have considered it an insult to their religion for him to enter their sacred city--the birthplace of the founder of their religion--and he would have been stoned or otherwise put to death. Some Europeans who have gone to Mecca have never returned, and nothing was ever heard of them. It is supposed they were discovered and murdered." "What barbarians!" exclaimed Fred. "Yes," replied the Doctor; "but if you speak to any of them about it, they will possibly reply that Christian people have put to death those who did not believe in their religion. They might quote a good many occurrences in various parts of Europe in the past five hundred years, and could even remind us that the Puritans, in New England, hanged three men and one woman, and put many others in prison, for the offence of being Quakers. Religious intolerance, even at this day, is not entirely confined to the Moslems." Frank asked what could be seen at Mecca, and whether the place was really worth visiting. [Illustration: ENCAMPMENT OF PILGRIMS AT MOUNT ARAFAT, NEAR MECCA.] "As to that," the Doctor answered, "tastes might differ. Mecca is said to be a well-built city, seventy miles from Jeddah, with a population of about fifty thousand. The most interesting edifice in the place is the 'Caaba,' or Shrine, which stands in the centre of a large square, and has at one corner the famous 'Black Stone,' which the Moslems believe was brought from heaven by the angels. Burckhardt thought it was only a piece of lava; but Captain Burton believes it is an aerolite, of an oval shape, and about seven feet long. The pilgrims walk seven times around the Caaba, repeating their prayers at every step, and they begin their walk by prostrating themselves in front of the Black Stone and kissing it. The consequence is that it is worn smooth, as the number of pilgrims going annually to Mecca is not less than two hundred thousand. The pilgrimage is completed with the ascent of Mount Arafat, twelve miles east of Mecca; and when a Moslem returns from his journey he is permitted to wear a green turban for the rest of his life. The pilgrimage is an easier matter than it used to be, as there are steamers running from Suez and other points to carry the pilgrims to Jeddah, and from there they can easily accomplish their journey to Mecca and return in a couple of weeks." Frank asked how far it was from Mecca to Medina, the place where Mohammed died and was buried.