This original painting was likely commissioned for the James Michener novel by that title, since Pether did other covers for this author for Corgi, in the mid 1980s - but it is unknown if the painting was actually used.  Regardless, this is a very beautiful image, very well done in landscape "wraparound" format in gouache and acrylic on illustration board 12.25" x 20.25"  and comes with a label affixed to the back attesting to authenticity.