Mark Twain's Prophetic Dream (sources)
- Life on the Mississippi, by Mark Twain, 1883 Boston, Massachusetts, USA. Pgs. 237-245. Online at: https://books.google.com/books?id=I-FEAQAAMAAJ&pg=PA237&dq=%22the+lacey+started+up+the+river+two+days%22&hl=en&sa=X&ei=A3slVYCqO463ogT67oHACg&ved=0CCMQ6AEwAQ#v=onepage&q=%22the%20lacey%20started%20up%20the%20river%20two%20days%22&f=false
- Mark Twain: a Biography, Vol. I, by Albert Bigelow Paine, 1912, New York, United States, & London, England. Pgs. 133-143. Online at: https://books.google.com/books?id=RdwpAAAAYAAJ&printsec=frontcover&dq=editions:c-Swrv_1ic8C&hl=en&sa=X&ei=QDgRVb_1FsLvoASZq4DgCw&ved=0CDQQ6AEwBDgK#v=onepage&q=henry%20dream&f=false
- "Mark Twain," article in the Wikipedia website, viewed 3-24-3015. Online at: http://en.wikipedia.org/wiki/Mark_Twain
- "Pennsylvania (steamboat)," article in the Wikipedia website, viewed 3-24-2015. Online at: http://en.wikipedia.org/wiki/Pennsylvania_%28steamboat%29
1891 harper's telepathy - http://digital.library.cornell.edu/cgi/t/text/pageviewer-idx?c=harp;cc=harp;rgn=full%20text;idno=harp0084-1;didno=harp0084-1;view=image;seq=0105;node=harp0084-1:9