Smoke is an appropriate representative of error, and symbolizes the Mohammedan doctrines; which, like the smoke of a great furnace, were disseminated far and wide, subverting the religion, and, in time, effecting the overthrow of the remaining portion of the Roman empire—the sun, one-third of which was smitten under the fourth trumpet. The locusts were generated in the smoke from whence they issued. In a corresponding manner, the spread of Mohammedanism resulted in the organization of hordes of Saracens, who propagated the religion of the false prophet by the sword, and founded the famous Arabian empire, which extended from the Atlantic ocean to the river Euphrates. The shapes of the locusts were like horses prepared for battle; and the Saracenic hordes, thus symbolized, were mounted horsemen, famous for the swiftness of their flight or pursuit, and ever ready for the contest. Their crowns, faces, hair, teeth, breast-plates, &c., seem to be indicative of their personal appearance: on their heads they wore yellow turbans, like coronets; their demeanor was grave and firm; their hair, like that of women, was suffered to grow uncut; they were defended by the cuirass or breast-plate; and in rushing to battle, their onset was like that of chariots and many horses. They had a king over them, named Abaddon in the Hebrew, and Apollyon in the Greek, both of which signified the Destroyer. The Saracens acknowledged the authority of Mohammed during the whole period of their conquests; not only recognizing him as their prophet and king during his lifetime, but his successors, after his death, considered and called themselves Mohammed’s _Caliphs_, or _Vicars_. Their mission was not against the grass, green things, and trees, but had express reference to the men who had _not_ the seal of God in their foreheads. The antithesis here expressed, shows that by the former were symbolized the servants of God, and that these locust-warriors were particularly commissioned against infidels and apostates. Christians were not to be molested; and provision was made for their protection, in the circular letter which Abubekir sent to the Arabian tribes, A. D. 633. He said: