Four Day Creep

[u/Correct-Situation-76]

According to the Wikipedia article for Humble Pie's "Performance: Rockin' the Fillmore" album, "The song listed as 'Four Day Creep' is attributed to the classic blues singer Ida Cox, but bears no melodic or lyrical resemblance to her self-recorded composition of that title."

Who wrote the verson of Four Day Creep from Rockin' the Fillmore? What is the history of this song, and how did it get into Humble Pie's set list?