claim: Doug Petrie was unable to appear in Dr. Horrible's Sing-Along Blog.
evidence: Drumclog Moss is a flat wilderness of broken bog and quagmire in Lanarkshire , Scotland .. wilderness. wilderness. bog. bog. quagmire. Mire. Lanarkshire. Lanarkshire. The Covenanters defeated Claverhouse 's dragoons at the site in the 1679 Battle of Drumclog .. Claverhouse. John Graham of Claverhouse. dragoons. dragoons. Battle of Drumclog. Battle of Drumclog