It should have been within the fall of 2011 that I first noticed the work of the good Senga Nengudi. That is when artwork historian and curator Kellie Jones offered the landmark exhibition Now Dig This!: Artwork and Black Los Angeles, 1960-1980 at LA’s Hammer Museum. An in depth and enriching screening, the present featured items from an astonishing array of creators, together with Nengudi, John Outterbridge, Suzanne Jackson, Maren Hassinger, David Hammons, Betye Saar, Alonzo Davis and Houston Conwill – artists who helped outline an period and a spot of which their contemporaries on the East Coast knew little, if something. Strolling into the present was like moving into…