Do not worry, Konstantin, those searches took himself auction house, which you pay the required amount, and which sends its successors.
Concerning the symbols, for example, MacDougall, a sign of this section:
§ Indicates Artists Resale Right applies.
I can not reproduce here the symbol used by the Sotheby's, so I refer you to the appropriate page of their site.
http://www.sothebys.com/app/live/sha...e_lot_id = 310
At Bonhams, frankly, I did not find this symbol, tomorrow look in more detail
