Sentence:  But on to the frothier side , Johnny Weissmuller , the only real Tarzan , telephoned Maureen O ' Sullivan , his first `` Jane '' [ now at Drury Lane , and <WSD>muttered</WSD> , `` Me Tarzan , this Jane '' ? 
Meaning of the word marked with <WSD> tags:  talk indistinctly; usually in a low voice