Okay, so I've been searching around the internet the last couple days and I've had no success with this. I lost Marcurio while getting one of the dragon priest masks (I don't remember which one) and I wasn't paying attention to him for a while because I was busy fighting a lot. Usually he can handel himself and I just let him be. But after leaving the temple I noticed he wasn't there. I didn't think this odd, sometimes he gets left behind and takes him a day or a fast travel to catch up. After two days of not having him I decide to go check the Bee & Barb, because this is also not unusual sometimes if I hit him in battle too much he gets huffy and leaves me. I get there and there is no Marcurio. And for the next five days I go and can't find him. I read online that fallen companions go to the Hall of the Dead, and he goes to the one in Riften because he's from there. I search every casket and theres no trace of any of Marcurio, or mine that he was cayrring, belongings. I repeat for 3 days.
I don't know what to do! I got a new companion but 1 I miss Marcurio and 2 he was carrying some super valuable stuff.
Am I doing something wrong? Could he be somewhere else?
Its been like 2 weeks and I check the Bee & BArb and the Hall of dead EVERY DAY!
HELP PLEEEEEEEEEEASE!