[CQ-Contest] origin of "es" in Morse code (cw)?

[Barry W2UP]

Note in this reference, which is supposed to be from 1920, ES is listed as
the code for the ampersand (just after Z).
https://ethw.org/w/images/b/bf/Morse_Telegraphy_1920.pdf

Barry W2UP


On Mon, Oct 5, 2020 at 6:03 AM Douglas Zwiebel <dougzzz at gmail.com> wrote:

> Hi all,
>
> I was just watching something on TV about the assassination of Lincoln and
> noted that at one point in the show, the address (which I can't remember
> exactly) was (say) "first and main," but it was listed at "1st es Main."
>
> Boy did that get me thinking.
>
> I tried Google, but nothing.
>
> Any help?
>
> de Doug KR2Q
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