My husband, Argis the Bulwark, dearted from Lakeview Manor about a week and a half ago, and I haven't seen him since. I thought he may have returned to my house in Solitude or Markath, but he is no where to be found

Is there a way I can get him back? I'm afraid the Dawnguard or Vigilants have murdered him, as I gave him the Dark Gft before we married.