This little gem was hanging up in the big train museum in ...Delhi?
If you can't read it, it says:

    
Letter   written   by   Okhil   Ch.  Sen in
1909   to   the   Sahibganj    divisional   office
West   Bengal   after  which  train  compart -
- ments   came   to   have   attached   toilets.
Dear Sir,
                      I am arrive by passenger train Ahmedpur station and my  belly  is too much
swelling with jackfruit.  I  am  therefor  went  to privy. Just I doing the nuisance that guard  making  whistle  blow for train to  go  off and
I  am  running  with  LOTAH  in  one hand &
DHOTI   in   the  next   when  I am  fall  over
&  expose all  my  shocking  to man & female women on platform. I am got leaved Ahmed-
-pur station.
           This    too   much   bad   if   passenger
go   to   make   dung   that   dam   guard   not
wait  train  minutes  for  him.  I  am  therefor
pray   your   honour  to  make  a  big  fine  on
that    guard    for    public   sake.   Otherwise
I am making big report to papers.
                        
        YOURS FAITHFULLY SERVENT,
                                                     OKHI.   CH   SEN.