Noun : scholarly monographs on medieval pigments.    From Dictionary.com. 

The faithful monographer above cited admits merit in Dunlop; but.    From Wordnik.com.  [A History of the French Novel, Vol. 1 From the Beginning to 1800] Reference

Men that undertake only one district are much more likely to advance natural knowledge than those that grasp at more than they can possibly be acquainted with: every kingdom, every province, should have its own monographer.    From Wordnik.com.  [The Natural History of Selborne, Vol. 1] Reference