There is very little mention of Quarry Farm in the Day By Day entries 
for the summer of 1880.  The family was in Elmira from June to 
September.  There was the birth of Jean and Livy seems to have been ill 
for the duration of their stay - which seems to have been limited to the 
Langdon home in Elmira.  Twain finished the Prince and the Pauper and 
there is some mention of his spending ten days at Quarry Farm at the 
beginning of July.

  I suppose I will need to dig through some of his biographies for 
details but I hope for some leads and/or suggestions from Twain-L 
members about Twain's time at Quarry Farm for this season.  I suspect he 
may  have just walked there and back when he wanted time to write.

Even though "Twain's Geography" is no longer on-line, I continue to work 
on it.

-- 
/Unaffiliated Geographer and Twain aficionado/