Wow, I don't think I had seen this before. I think you're probably referring to this section:
https://en.wikisource.org/wiki/Bible_(King_James)/Preface#%C...
Or maybe even further
https://en.wikisource.org/wiki/Bible_(King_James)/Preface#%C...
https://en.wikisource.org/wiki/Bible_(King_James)/Preface#%C...
> Yet for all that, as nothing is begun and perfected at the same time, and the later thoughts are thought to be the wiser: so, if we building upon their foundation that went before us, and being holpen by their labours, do endeavour to make that better which they left so good, no man, we are sure, hath cause to mislike us; they, we persuade ourselves, if they were alive, would thank us.
(I didn't realize that the Preface had so much discussion of the history of Bible translation!)