OSSIBUS MIGRANTIBUS is playfully ambiguous.
You may take it as part of an ablative absolute = as bones roam about
that surrounds the word revisenda
You may take it as a dative of agent = by the roaming bones.
This book helps the Bones that is the monuments of Rome and of Latin texts to speak today
OSSIBUS REVISENDA MIGRANTIBUS
As Bones Roam About, Things – Places – Events to be revisited
Things – Places – Events to be Revisited by Roaming Bones
Teaching in Rome for decades provided the opportunity for visiting the places where the events of western history unfolded with the original Latin texts as our guide. These texts have been collected and we hope to provide them in book form.