Sentence:  The unnamed chronicler in his Dupin stories was the first Dr. Watson type of <WSD>satellite</WSD>—a narrator who accompanies the detective on his exploits, exclaims over his brilliancenb.... 
Meaning of the word marked with <WSD> tags:  An attendant on an important person; a member of someone's retinue, often in a somewhat derogatory sense; a henchman. (from 16th c.)