Three recently discovered drawings for the classic children's book "Winnie the Pooh" are expected to fetch 30,000 pounds ($50,200) at a London auction in May, Sotheby's said Thursday.

The anonymous owner said he decided to sell them after reading about another set of Pooh drawings recently sold at auction. He said his mother was given the drawings in the 1960s by a friend.The artist, Ernest Shepard, who illustrated many of A.A. Milne's stories, often gave away sketches of the famous characters as presents.

The largest drawing shows Pooh and Christopher Robin writing letters at a desk and is estimated at 10,000-15,000 pounds. Another shows Pooh sitting with a pot of honey, and in the third he is licking his paw.