I am trying to find those who have spoken about the anthracite coal found in Portsmouth, R.I. because I have a report of the chemical analysis of that coal from the late 1800's that is quite detailed concerning this type of anthracite coal.
I am looking for a similar type report for the coal found at the Viking Western Settlement in Greenland in the 1930's by a Helge Ingstad. Any help here??? Could we finally have definitive proof of Viking voyages to the new world, mainly into Narragansett Bay well before Columbus???