I had Fawkes as a companion waiting in the citadel hospital (I had just completed game and I installed the Broken Steel add-on) I went to the boat to get to Point Lookout but they said I had to get rid of any companions I had. I fired Fawkes and he said he was going to the history museum. When I got back from Point Lookout, I went to the museum to get him back but he isn't there. Theres an aqua cura stand with a load of ghouls there, but no Fawkes. I have been back to the hospital in the citadel to see if he was there but he wasnt. I never got a message saying he has died either. Anyone know where he is? :/

Happened to me too in a old save, still never found him. Idk what to tell you :shrug:

Is it possible he got stuck on a rock or something on his way back to the museum?