Wow, that's really spooky that I read it as Church St, Salem, not a million miles away, when I'd originally thought it likely to be a London imprint. Is it still possible that the Bible and Heart was selling broadsides at an earlier date? With the above info we don't know if the Fleets were stationers or printers or both. I'll see if I can find out more now we have a name and definite address.