Sometimes when keyword searching Hamnet, the results include mystery matches: when you Ctrl-V to find the word you’re looking for on the page, it’s not there. That’s because some fields only display on the “MARC view” tab. Usually the information isn’t worth making public. For example, what displays as:
The only hidden piece of information is “CMS 20101102” – the initials of the cataloger who created the record and the date the record was finished.
Sometimes, though, information in a non-public note seems worth bringing to light. When keyword searching for “fingerprints” the other day, the results included the Hamnet record for Folger call number STC 22459b.2 for no apparent reason. That’s because “fingerprints” only appears in a non-public note, which can be revealed by clicking the MARC view tab:
If the information wasn’t meant for public viewing, who was it meant for? Answer: staff of the English Short Title Catalogue (ESTC). It’s in the 509 field, which Folger ESTC catalogers used in the late 1990s and early 2000s to send messages back and forth to ESTC Headquarters. Sometimes entire conversations about an item take place in the 509.
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