The Meaning of "Third Part" in Revelation 7

From: Letters 2
Narrator: Chris Genthree
Duration: 1min
AD; Revelation 12:4  •  1 min. read  •  grade level: 8
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My impression is, for I do not dogmatize on such points, that "the third part" (Rev. 8:77The first angel sounded, and there followed hail and fire mingled with blood, and they were cast upon the earth: and the third part of trees was burnt up, and all green grass was burnt up. (Revelation 8:7)) is the Roman earth considered in its body in the West. In chapter 9. I apprehend there is the action of the Euphratean horsemen, so-called, against the powers of the Roman earth. In chapter 8. the judgments fall on the Roman earth. Chapter 12:4 confirms the idea of this use of "third," because this is clearly, I suppose, the power of Satan in the Roman empire, and his tail draws down the third part of the stars and casts them to the earth; that is, a third part of the independent but smaller powers were reduced into subjection to Satan's power displayed in this form.
Dublin,
June, 1871.