How should you use taciturn?

Taciturn shows up in English in the first half of the 18th century. James Miller, a British clergyman educated at Oxford, gives an early example of its use in his 1734 satiric drama, wherein a character describes a nephew with the following: "When he was little, he never was what they call Roguish or Waggish, but was always close, quiet, and taciturn." It seems we waited unduly long to adopt this useful descendent of the Latin verb tacēre, meaning "to be silent"; we were quicker to adopt other words from the tacēre family. We've been using tacit, an adjective meaning "expressed without words" or "implied," since at least the mid-17th century. And we've had the noun taciturnity, meaning "habitual silence," since at least the mid-15th century.