"In the hexameter rises the fountain's silvery column; In the pentameter aye falling in melody back."
It is possible that the connection between elegy and the idea of mournfulness arises from the fact that this metre was a favourite one for funeral inscriptions; but it was used also for joyous poems and for war songs. Everyone knows Gray's Elegy, and readers of Hood's comic poems will remember his line --
"And I've been singing his L-E-G."