Jan 28 - 2006 - Writers including JK Rowling, Ian Rankin and Tom Stoppard were asked to fill a sheet of A4 paper to auction for charity.
Here is a sneak preview JK Rowling's page which sets out the Family Tree of the "Noble and Most Ancient House of Black" courtesy of the Saturday Telegraph. Sam Leith, the journalist covering the auction preview comments that the family tree "provides a genealogical link between Harry's enemy, Draco Malfoy and his dear departed friend Sirius ... "