The Silent Woman (Missing Mysteries #43)

When fire destroys their London theater, Lord Westfield's players must seek out humbler venues in the countryside. But company manager Nicholas Bracewell is distracted by a shocking tragedy: a mysterious messenger from his native Devon is murdered by poison. Though the messenger is silenced, Nicholas understands what he must do -- return to his birthplace and reconcile some unfinished business of the past.
The rest of Westfield's Men, penniless and dejected, ride forth with him on a nightmare tour that will perhaps become their valedictory, dogged by plague, poverty, rogues, and thieves. And among the sinister shadows that glide silently with them toward Devon is one who means Nicholas never to arrive...