Yeats' Grave is the actual title. The publishers made the "Yeat's" grammatical error on the album's first release and never corrected it. Yeat's means belonging to Yeat - his name is Yeats. The rules on the grammar for this depend on pronunciation. If you pronounce it, "Yeats Grave", (as you should) then it's written 'Yeats' Grave'. If it was pronounced, "Yeatses Grave", you'd write 'Yeats's Grave'. The correct title can only be found written on iTunes, etc. The physical CDs were never corrected, including the latest 2006 Japanese release of 'No Need to Argue'.