Scott,
Willis does list the 17 July 1880 date in her notes and locates it in MTP.
I can't explain the age of Susie there.

Warren, my earlier "response" got away from me. I wanted to send p. 103 but
it was too large to go through.
Miki

On Mon, Aug 23, 2021, 5:39 PM Scott Holmes <[log in to unmask]> wrote:

> Thank you, Barbara.  This does look like the earliest use of a special
> car - four years later than indicated in Day By Day. Fears got it from
> Willis (the attribution is in his text) and apparently Willis found this
> letter but apparently forgot the date it was written.  Near the bottom
> of the page Miki sent me is a note that Susie was four years old at this
> time - 1876 not 1880.
>
> On 8/23/21 3:16 PM, Barbara Schmidt wrote:
> > Scott,
> >
> > Rest Willis does quote the passage about Livy always going by special car
> > hereafter and sources it to a June 17, 1880 letter to Lilly Warner. It is
> > online here —
> >
> https://www.marktwainproject.org/xtf/view?docId=letters/UCCL01814.xml;query=Warner;searchAll=;sectionType1=;sectionType2=;sectionType3=;sectionType4=;sectionType5=;style=letter;brand=mtp#1
>