Sentence:  The aged sisters draw us into life: we wail, batten, sport, clip, clasp, sunder, dwindle, die: over us dead they bend. First, saved from waters of old Nile, among bulrushes, a bed of fasciated wattles: at last the cavity of a mountain, an occulted <WSD>sepulchre</WSD> amid the conclamation of the hillcat and the ossifrage. 
Meaning of the word marked with <WSD> tags:  A burial chamber.