Can't help to find Blind Blake's publisher.The only help I can offer is another version of the song,Frederick McQueen and Rev W.G.McPhee, is listed as trad arr performers, Happy Valley Music,BMI. That is the version on the Rounder Records,Kneelin' Down Inside the Gate. the sleeve notes have very interesting stuff about Joseph Spence witnessing the wreck that inspired the song,and finding the dead and their belongings on the beach.
   Blind Blake first recorded the song, but whether he wrote it is another question.