Mrs. Carvill Lewis gladly avails herself of this opporÂtunity to express her indebtedness and gratitude to Professor T. G. Bonney for
his kindness in arranging and editing the papers and notes contained in
this book, in accordance with the wishes of the late Professor Henry
Carvill Lewis, whose desire it was that his researches on the origin
and matrix of the diamond should be given to the scientific world.