Common bleak extracted from the scales of the common bleak, so-called "Essence Orientale" or "pearl essence", (used in making artificial pearls) which is crystalline guanine. Common bleak The common bleak ("Alburnus alburnus") is a small freshwater coarse fish of the cyprinid family. The body of the bleak is elongated and flat. The head is pointed and the relatively small mouth is turned upwards. The anal fin is long and has 18 to 23 fin rays. The lateral line is complete. The bleak has a shiny silvery colour; and the fins are pointed and colourless. The maximum length is approximately 25 cm. In
Bleak House, Broadstairs in which it is situated. Charles Dickens spent summer holidays at Fort House in the 1850s and 1860s and it was there in that "airy nest" above the harbour that he wrote "David Copperfield". Fort House was dubbed Bleak House in the early part of the 20th century. Somebody asserted that it was the Bleak House referred to in Dickens' 1853 novel, and the name stuck. There has been much dispute over the truth of the claim. Some people believe that the house from which Dickens took his inspiration is far distant from Broadstairs. What can be certain is that