Alma Thomas
Object lessonsgallery
Object lessons: from a spring-time Alma Thomas to an enamel lamp representing an 'ecstatic orgasm'
Our pick of highlights from this week's auctions and fairs
Auctionsanalysis
New York's autumn sales were subdued but not necessarily septic
Overall sales were down by around 30% but beyond the disappointing headline figures, women and minority artists shone
African-American fakes on the rise
The problem is exacerbated as estates and foundations are increasingly unwilling to authenticate due to the threat of litigation