He immigrated to the United States, living first in New York City then settling in Antioch, California.
At the age of nineteen, Angelo moved to San Francisco, working by day as a labourer and spending his evenings and weekends at libraries and museums.
Angelo's favoured medium was the linocut, and his prints depicting urban nocturnes and desert scenes of the American Southwest are particularly coveted by collectors and dealers.
Among these were folio editions of Walt Whitman's Leaves of Grass, The Travels of Sir John Mandeville, and numerous books of the Bible.
After a mid-life relocation to New York state, he returned to San Francisco in 1974 and continued his life's work.