These letters give a brief glimpse into the mining business in the early Nineteenth Century. Alexander McIntyre to whom these letters are addressed was an ambitious entrepreneur in the coal and iron country of New York and Pennsylvania with his name being passed on to many sites in these states.

Frederick Burritt Peck, a geologist, created a notebook detailing information regarding the Vanport Limestone in Lawrence County in Pennsylvania. His preliminary report is divided into different topics about the limestone from its availability to its general description. The destination of the report is unknown.

Business archive of the little documented Johnson Run Mining Company in Elk County, Pennsylvania. Also included are related personal papers of the officers, the brothers: Harry/Henry Gibbs Clay and Antony Alexander Clay, A. A. Clay’s daughter Estella Clay Priestley, Sybella Gordon Clay Reese; granddaughter Marian R. Priestley Frank and Thomas Leiper Kane, a member of the family that founded Kane, Pennsylvania.

The collection of 19 maps issued by the Pennsylvania Bureau of Mines details both the anthracite and bituminous coal fields of Pennsylvania in great detail.

A small collection of vintage publications, promotional material and ephemera related to anthracite coal usage in Lehigh Valley.

A documentation of court history of Schuylkill County, Pennsylvania, infamously known as the site of the activities of the Molly Maguires, a secret society primarily of Irish miners who riot against anthracite coalmine owners in the mid-1800s. Although the time frame of this court history was before the real "crime wave" that appeared in the anthracite mine area, it is indicative of the labor unrest prevailing throughout the citizenry in the Pennsylvania coalfields.