I am informed by half the known free world that I typoed/erred when I wrote that the Northgate company went bye-bye in '77. I meant to type '87 (on a Northgate keyboard, no less) and even that would have been wrong. Harry McCracken, who knows this stuff better than I do, informs me, "The original Northgate was bought by Everex in 1992 and disappeared at some point during the 1990s, but the name has been revived from time to time since." At least Harry agrees with me that it's amazing how the company's keyboards have endured.
And the other half of the known free world wrote to ask about a Groucho/Chaplin anecdote I related. There is a photo of Mssrs. Marx and Chaplin together at the luncheon that preceded the Oscar ceremony that year. There also seems to be some question as to whether the cook's account of a post-ceremony visit is accurate. So I've deleted that section and will research further.
Thanks to all who wrote. I was a little sleepy last night and I appreciate you all keeping me honest. Or relatively honest.