FRANKLIN, Mass. – Three oil and enamel paintings attributed to renowned American artist Mark Rothko (1903-1970) – two untitled abstract compositions and one untitled (Blue Square) – all framed, signed verso and dated 1948 – carry estimates of $100,000-$200,000 each in Woodshed Art Auctions’ Prestige Signature Collection auction ending Nov. 1. Absentee and Internet live bidding is available through LiveAuctioneers.