It occurs to me that as we begin the second “leg” of Alan Moore and Jacen Burrows’ Providence with the just-released seventh issue that we as readers are on no firmer ground, metaphorically speaking, than hapless protagonist Robert Black is in a more literal sense — having fled Manchester without even knowing how much time he spent there much less what happened both to and around him, our hero/victim next turns up in Boston smack-dab in the middle of the notorious round of riots and looting instigated by the city’s police strike of 1919, an engineered debacle both triggered by the actions of, and then capitalized for political gain by, then-governor Calvin Coolidge, one of early-20th-century America’s more loathsome figures. For our hopelessly cracking (or maybe that should be already cracked)  former newspaperman, though, the violence and depravity he sees unfolding on the streets of Beantown is a pretty accurate…