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Volumes

1. Vol 1 Sounders, Relays & Landline Instruments — Vol 1: Reading With Your Ears The whole strange, wonderful truth of landline telegraphy is that the good operators threw away the paper and just listened. This is the sounder — a machine that makes no tone, only two clicks — and how a brass-pounder read a language in the silence between them.
2. Vol 2 Sounders, Relays & Landline Instruments — Vol 2: The Relay, the Local Circuit, and the Brass The sensitive instrument that let a whisper on the main line ring a loud sounder in the office; the key-on-base sets and the makers who built them (one of them right here in Michigan); and the unbroken line from a brass-pounder's bench in 1880 to the key under my hand tonight.