On Mon, 18 Aug 2014 11:18:12 EDT, Foxs Mercantile
wrote:

Pre-Google, Thomas Betts map books had their share of
errors as well.

Were you thinking of Thomas Brothers? Thomas & Betts is a
manufacturer of electrical connectors.

I was told many decades ago by the cartographers at the Automobile
Club of Southern California that they would put in known mistakes in
an effort to foil competitors' plagiarism. The ACSC maps were some of
the best street maps available at the time and were used quite a bit
in transmitter hunts even after they stopped being published.

73 de K2ASP - Phil Kane

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon