The trade in ivory is but another name for trade in human beings, and the only real commerce this vast, fruitful region has with Zanzibar is through its captured inhabitants, while the slain equal the number sent into captivity. But, while Mr. Stanley feels keenly the disgrace to humanity of this accursed traffic, he evidently does not see so clearly the way to put a stop to it. He is opposed to filibustering of all kinds, and to the interference of strong powers to coerce weak ones on the ground of humanity or Christianity, because it opens the door too wide to every kind of aggression. In fact, this makes it only necessary to use some philanthropic catch-word, in order to justify the annexation of any feeble territory. Stanley evidently thinks there is some limit to the Monroe doctrine of non-interference in the affairs of other nations, as the following extract from one of his letters shows, in which, after discussing the whole matter carefully, he says he writes, "hoping he may cause many to reflect upon the fact that there exists one little State on this globe, which is about equal in extent to one English county, with the sole privilege of enriching itself by wholesale murder, and piracy and commerce in human beings, and that a traffic forbidden in all other nations should be permitted, furtively monopolized by the little island of Zanzibar, and by such insignificant people as the subjects of Prince Burghosh." Mr. Stanley is entirely opposed to filibustering and encroachments of strong powers on feeble ones, under the thousand and one false pretences advanced in support of unrighteous conquests, yet he evidently thinks little Zanzibar should be wiped out, or cease to be the source and centre of this cruel traffic in human beings. One has to travel, he says, in the heart of Africa to see all the horrors of this traffic.