What evidence suggests pips convict may have attacked Mrs.Joe? Who does pip believe attacked her?

Pip immediately suspects Orlick, though, strangely, his sister was hit with the shackles that the convict filed off in the first chapter! Because of this connection, Pip also suspects the one-eyed man that Joe and he had met in the pub, and who had demonstrated his own knowledge of Pip's past by stirring his drink with the file used to free those same shackles.