 Holland produced the first scientific description of what he named as charnockite from Job Charnock's tombstone near Calcutta which had been brought from somewhere in Madras.Holland continued work on the gneisses of southern India that had earlier been classified by William King and Robert Bruce Foote.Holland reclassified the hypersthene granites as acidic (the charnockites, with the type being from St Thomas Mount), the intermediate, basic, and ultrabasic.