NEW YORK — The spring Illustration Art sale at Swann Galleries is set to come across the block on Thursday, June 9. The auction will feature a rich selection of children’s picture book art from the collection of the late Emily and Sam Bush. The sale will also feature theater set and costume design, advertising art, works from notable picture books, literary publications, cartoons and comics from esteemed illustrators. Absentee and Internet live bidding will be available through LiveAuctioneers.