Not At Home - By Samuel Taylor Coleridge

That Jealousy may rule a mind
    Where Love could never be
  I know; but ne'er expect to find
    Love without Jealousy.

  She has a strange cast in her ee,
    A swart sour-visaged maid--
  But yet Love's own twin-sister she,
    His house-mate and his shade.

  Ask for her and she'll be denied:--
    What then? they only mean
  Their mistress has lain down to sleep,
    And can't just then be seen.

1830.