During the Spanish Flu pandemic, the painter Stuart Davis caught the virus and left New York City to convalesce in Havana, Cuba. It was early in his career, and while recuperating Davis set to work on 10 evocative watercolors, taking in the shapes and colors of the Caribbean. Though it was a short period of time, “it was a watershed moment” for the artist, says Priscilla Vail Caldwell, curator of “Stuart Davis in Havana.” All 10 paintings are in the exhibition, which includes archival material from Davis’s trip—lottery tickets, postcards, and his passport. —E.C.