This collection consists of manuscripts, a diary, and some biographical information. The manuscripts are all handwritten, and most appear to have been written by Lyman Miller. They address various topics and issues, ranging from "Socialism" to "An Oyster Supper." The longest manuscript is that of a novella written by "Augustus Smith" relating the trials of his marriage to a highly educated wife. One of the manuscripts is a student paper by Bertie Miller.

The diary was written by Lyman Miller and consists of handwritten pages bound together with string. It related the events of his daily life from April through November, 1883.

The biographical material consists of several typewritten pages giving genealogical and other information about members of the Miller family.

This collection is made up of records of the various agencies of the church. It also includes material regarding local churches and annual conferences. The collection is made up of thirteen series. The three largest series which make up the bulk of the collection are the Missionary Society, the Woman's Missionary Society, and the Board of Christian Education.

This collection primarily documents the work and ministry of the Evangelical Church's annual conferences and local churches from the middle nineteenth century to the middle twentieth century. To a lesser degree there are records that reflect the ministry of the general church as well. There are other records that pertain to filial denominations such as the Evangelical Association, United Evangelical Church, Church of the United Brethren in Christ (United Brethren Church), and the Evangelical United Brethren Churches are also found in this collection. Leedy was an avid collector of church related information so that the topical landscape of this collection is broad enough to cover information ranging from local church ministries and histories to denominational theological beliefs and social concerns. Most of the paper records center on church work in the Ohio region though not to the exclusion of other geographic areas within the continental United States and Germany. All in all this collection provides a nice overview of the diversified life within the Evangelical tradition and is an excellent resource for those who wish to understand more fully the Evangelical Church's historical influence within the ongoing traditions of United Methodism.