There are about a dozen different kinds; but the principal are Bohea, congou, and Souchong, and signify, respectively, inferior, middling, and superior.
"The Book of Household Management"
Mrs. Isabella Beeton
"Happy Establishment" So called after two ranges of hills, Fu-Kien or Fo-Kien congou .
"The Little Tea Book"
Arthur Gray
Here we sat down comfortably together; and while our wet shoes and socks dried before the blazing fire, and our chafed toes wriggled joyously at being relieved from the painful harness of the snow-shoes, we swallowed a cup of congou with a degree of luxurious enjoyment, appreciable only by those who have walked themselves into a state of great exhaustion after a hurried breakfast.
"Hudson Bay"
R.M. Ballantyne