Indentures from southern Indiana

Longer ago than I care to admit, Cyndi's List called my attention to the Floyd County, Indiana, Genealogy Trails web site. Like the far-southern-Indiana county's GenWeb site, it has many useful tidbits produced by volunteers, but of one item they have a goodly amount of a kind of record I don't see much of: indentures from the mid- and late 1800s in Floyd and neighboring Harrison counties, many for apprenticeships. Clearly these are legal documents and they seem to be faithfully transcribed, but the site doesn't identify either the transcriber(s) or the location(s) of the original documents.