....Burra had been influenced particularly by the Mexican muralists and the prints of Jose Guadalupe Posada with their depictions of lively skeletons. The Day of the Dead theme, central to Under the Volcano is echoed in Skeleton Party, completed nearly 20 years after the trip. The pyramid shapes on the horizon have been identified as slag heaps in an industrial landscape, rather than the twin peaks of Lowry’s Mexican volcanoes. (https://gerryco23.wordpress.com/2012/01/11/edward-burra-hastings-to-harlem-and-back/)