Indo-Greek Kingdom
Other potential centers are only hinted at; for instance , Ptolemy's "Geographia" and the nomenclature of later kings suggest that a certain Theophila in the south of the Indo-Greek sphere of influence may also have been a satrapal or royal seat at one time . 
<triplet> Ptolemy <subj> Geographia <obj> notable work <triplet> Geographia <subj> Ptolemy <obj> author