Richard Whately 
Elements of Rhetoric [PDF ebook] 
Comprising the Substance of the Article in the Encyclopaedia Metropolitana, With Additions, &C

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The error is precisely the same in respect of Rhet orie and of Logic; both being instrumental arts; and, as such, applicable to various kinds of subject-matter, which do not properly come under them.