Here’s an inkling:

Volume 1
John D. Morgenstern, General Editor
Oxford University Press, 2017


The Short and Surprisingly Private Life of King Bolo: Eliot’s Bawdy Poems and Their Audiences
By Jayme Stayer 

Note 29, p. 28:

“Ricks and McCue seem to imply that the pocketbook is from 1915 ... but in my examination of these manuscripts and the related circumstantial evidence (especially the appearance of British spellings), I am led to conclude that the pocketbook dates to the late teens.”


On Fri, Apr 6, 2018 at 10:34 AM Chanan Mittal <[log in to unmask]> wrote:
An interesting issue to explore would be at what point Eliot turned to British spellings. 


On Fri, Apr 6, 2018 at 9:20 AM Rickard A. Parker <[log in to unmask]> wrote:
On Thu, 5 Apr 2018 09:32:56 -0400, Rickard A. Parker
<[log in to unmask]> wrote:

>Warning: this is a stupid post but I was
>curious and I decided that it wouldn't
>hurt to post the results of my "study."
>So, which is actually the cruelest month?

This post is stupid too. Today a search brought up the following text:
T.S. Eliot wrote "April is the cruelest month" and that's certainly
proving true for
winter-weary folks across the northern U.S., ...

That got me wondering - did Eliot originally WRITE the British CRUELLEST
or the American CRUELEST?

I lost my TWL facsimile ages ago (probably because I was hauling it
around so much and I ended up forgetting to haul it back) so I checked
for an online copy. I saw that in the typescript he had the British
spelling but I wasn't able to see if there were an earlier manuscript
version of the line. Maybe someone can help me out.