Despite global unrest and a continually worsening conflict in the Middle East, dealers surveyed by *ARTnews *in their stands at the TEFAF art fair in Maastricht, when willing to discuss sales, were more than pleased. Even if, as one dealer observed, collectors from the Middle East may have been unable to travel. (Another quipped, “There’s email. There’s WhatsApp.”) The show must go on. “The caliber of collectors is extraordinary,” said first-time exhibitor Alison Jacques, of London, who noted a greater international attendance than she expected. By the end of day one on Thursday, the dealer had placed works by Eileen Agar and Sheila Hicks. Also on offer are pieces by Pacita Abad, Ana Mendieta, and Dorothea Tanning, among others. Jorn Günther, a rare books dealer from Basel who has exhibited at TEFAF for thirty years, said this year was his best.…