The objective is to investigate the Devonian Shale (gas) potential in the Mt. Vernon, Ohio area. The subject lineament analysis subroutine was designed as an exploration technique to locate a new (contract) well to test the Devonian Shale for hydrocarbon accumulations. The library of maps and images, i.e. in any final process combination leading to final photography which presented an array of same area view were analyzed, and major regional lineaments were identified. This paper presents: the exploration rationale; method; results of investigations 1 to 4; next step rationale; and recommendations. 2 figures.