Provenance answers questions about who has owned an object and how it came to be in it's current location. It's complicated research but you can focus on aspects of who donated your objects to the Fleming and how they in turn came to have them. In additon to sources else where in this guide, sources that might help you with this:
Silver Special Collections Library
Search Finding Aids and talk with Special Collections librarians to see if they have information on donors. Many donors to the Fleming have Vermont ties.
Google
Yep, search for names in Google to learn about people associated with your object.