Sentence:Quaint things the women wrought for her -- pomanders and cushions of thistledown; and the men were never happier than when they could tell her of the first thrush's egg in the thorn-bush or the [e1]sedge[/e1] of [e2]bitterns[/e2] that haunted the marsh.
 e1: sedge. 
 e2 : bitterns.
Answer: Member-Collection(e2,e1)