Some subscribers to Math-Teach might be interested in a recent post "How To Write Good - ADDENDUM #2" [Hake (2013)].  The abstract reads:

ABSTRACT: In response to "How to Write Good" [Hake (2013)] at <>, Gene Glass wrote (paraphrasing): " 'The Elements of Style' [Strunk & White (1959, 2000)] at <> might be the undergrad's guide to good writing, but Jacques Barzun's (1975, 2001) 'Simple & Direct' at <> is surely the postgraduate textbook."

That "Simple & Direct" is also "Thorough and Scholarly" is manifest in its CONTENTS page:
I. DICTION, or Which Words to Use
II. LINKING, or What to Put Next
III. TONE AND TUNE, or What Impression Will It Make
IV. MEANING, or What Do I Want to Say?
V. COMPOSITION, or How Does It Hang Together
VI. REVISION, or What Have I Actually Said?
Hints Toward Improving the Quoted Sentences
Index of Words, Topics, and Authors

For information on Barzun see e.g.:
(a) the Wikipedia entry at <>;
(b) the eulogy by Rothstein (2012) at <>;
(c) the eulogy by Epstein (2012) at <>;
(d) the interview by Gathman (2000) at <>;
(e) the biography by Murray (2011) at <>;
(f) Barzun's (2002) book "A Stroll With William James" <>, whom
     Barzun regarded as his "guide and mentor."
To access the complete 18 kB post please click on <>.

Richard Hake, Emeritus Professor of Physics, Indiana University
Links to Articles: <>
Links to Socratic Dialogue Inducing (SDI) Labs: <>
Academia: <>
Blog: <>
GooglePlus: <>
Google Scholar:  <>
Twitter: <>
Facebook: <>

"[Jacques Barzun] wrote in a flawless and magisterial manner on a vast array of subjects: Darwin, Marx, Wagner, Berlioz, William James, French verse, English prose composition, university teaching, detective fiction, the state of intellectual life, and finally, published when he was 93, his magnum opus, 'From Dawn to Decadence: 500 Years of Western Cultural Life, 1500 to the Present.' None of this writing seemed motivated by his desire to advance his career; all of it derived from genuine intellectual passion."
  - Epstein (2012)

REFERENCES [URL's shortened by <> and accessed on 12 May 2013.]
Epstein, J. 2012. "Jacques Barzun: An Appreciation, Wall Street Journal, 26 Oct., online to subscribers at  <> (non-subscribers can read the entire article by searching Google for "Jacques Barzun: An Appreciation."

Hake, R.R. 2013. "How To Write Good - ADDENDUM #2," online on the OPEN! Net-Gold archives at <>. Post of 11 May 2013 14:56:55-0700. The abstract and link to the complete post are being transmitted to several discussion lists and are on my blog "Hake'sEdStuff" at <> with a provision for comments.