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.
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"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