CHAPTER XXI.
OCTOBER 1, 1832--FEBRUARY 28, 1833 Packet-ship Sully .-- Dinner-table conversation .-- Dr.Charles T.Jackson .-- First conception of telegraph .-- Sketch-book .-- Idea of 1832 basic principle of telegraph of to-day .-- Thoughts on priority .-- Testimony of passengers and Captain Pell .-- Difference between "discovery" and "invention."-- Professor E.N.

Hereford's paper .-- Arrival in New York .-- Testimony of his brothers .-- First steps toward perfection of the invention .-- Letters to Fenimore Cooper.