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Locations of the form 122-T-13 are specific NPL sites that are recorded in card files in the curator's office. The form is [county number]-[state]-[site]. You may see these locations for other states. Given that these are well known, they will normally already be nailed down in Specify. Note that this is not always true. In particular, some of these locations are described on more than one card, sometimes with varying levels of detail. These are also available in a spreadsheet at Z:\DocLib\GeoReferencing\BEG-Localities-Cards - especially useful if working remotely.
There are other location formats used in some of the scanned BEG, King, Plummer, etc. catalogs on the Z: drive (Z:/Doclib/Catalogs). Plummer and Moore often used ones like 56.3 - it turns out these show up in the lists of locations in some of their papers. The catalogs on the Z drive were often the source for data entered into Specify. The original text may contain information that was left out during transcription.
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