The Synthesis of Yoga - Sri Aurobindo Ashram

Note on the Text 915
(the addition of part-titles was part of the revision). He began this
work by marking up pages torn from the Arya and then continued on
copies handwritten or typed by disciples.
Period 3. During the early 1940s, Sri Aurobindo did further work on
the later chapters of Part I, using typed copies of the pages from the
Arya revised during Period 2. At the same time he began to write two
new chapters, which he apparently intended to add to this part, but
which he abandoned before completion.
During the later part of the 1940s, Sri Aurobindo lightly revised
the entire first part of the Synthesis while preparing it for publication.
What follows is a brief part-by-part description of the revision.
Introduction: The Conditions of the Synthesis
Sri Aurobindo made sporadic minor changes to these five chapters during
Period 1 and possibly also Period 2 of the revision. His alterations
and additions, marked in issues of the Arya and a set of pages torn
from the journal, were not discovered until the 1970s, and appear as
part of the text for the first time in the present edition.
Part I: The Yoga of Divine Works
The twelve chapters of this part correspond to eleven Arya chapters:
I – II and IV – XII. (There was no chapter numbered III in the Arya;
the present chapters V and VI correspond to Arya chapter VI.) Sri
Aurobindo revised each of these chapters during Period 2. The work
done ranges from the light retouching of some pages to the rewriting or
new-writing of long passages. During Period 3 he continued the work
of revision begun in Period 2, concentrating on the last six chapters,
and prepared the entire part for publication.
Chapter I. Moderately revised during Period 2.
Chapters II – IV. Heavily revised during Period 2. Sri Aurobindo added
the entire second half of chapter IV at this time. He also made stylistic
changes and added new material to all three chapters, but did not
fundamentally alter their structure.
Chapters V and VI. Completely rewritten during Period 2 on the basis
of Arya chapter VI, little of which remains in the final text.