p. 27 “They commissioned a new logo from Sundberg-Ferar, an industrial design ﬁrm responsible for designing a new subway car, and they created special strip maps (set in Futura) for use on the no. 7 Flushing Line (ﬁg. 270).” The reference for the TA logo should be ﬁg. 269.
p. 30 “In the summer Noorda ﬂew to New York to carry out a detailed survey of the trafﬁc flow at ﬁve key subway stations: Times Square, Grand Central Station, Broadway/Nassau, Jay Street and Queensborough Plaza (ﬁgs. 31–32).” The reference for the Noorda drawings should be ﬁgs. 81–82.
Peter B. Lloyd, who is working with Mark Ovenden on a book surveying the history of New York City subway maps, has also pointed out that the TA logo designed by Sundberg-Ferar appeared on the cover of the 1964 New York World’s Fair subway map. This is earlier than the date of 1965 which I cite for the creation of the logo. (See p. 122 Chronology entry for 1965.)