An index to Hendricks County marriage application book 2 (which covers 2 February 1907 to 19 December 1908) has been added to the Hendricks County GenWeb site. Beginning in May 1905, Indiana law required the recording of marriage applications, which included biographical details about the bride and the groom, as well as their parents. In Hendricks County, the information from these applications was kept in a separate set of books from the marriage record until June 1950.
The Hendricks County Government's Archive has digital files of some of the marriage application books. The digitizing is in progress - so far the books that cover 1905 through 1923 are online.