Statistics for occurrence #1 of “Acheron” in book 3, card 40 of Lucretius, De Rerum Natura:
...d with a motion everlasting on,
And in what mode things be from them create,
Now, after such matters, should my verse, meseems,
Make clear the nature of the mind and soul,
And drive that dread of Acheron without,
Headlong, which so confounds our human life
Unto its deeps, pouring o'er all that is
The black of death, nor leaves not anything
To prosper- a liquid and unsullied joy.
...