Johndog, you're talking about the Preble's Meadow Jumping Mouse, right?
If so, here's something that'll amuse ya: the Preble in question is peeved as hell at having his name attached to the little rat.
"If your determination is fixed, I do not counsel you to despair. Few things are impossible to diligence and skill. Great works are performed not by strength, but perseverance."
-- Samuel Johnson