Serial entrepreneur Jack Dorsey is pointing out the origins of his new start-up, Square, as he stands in the middle of its new office space inside the San Francisco Chronicle building.
It is move-in day in a section of the newspaper's emptying headquarters that now has to be sub-let. The Chronicle, founded in 1865, has seen its staff and circulation shrink by more than a quarter in the past three years as people turn to the internet for their news.
The inventor of Twitter, the micro-blogging service, is aware of the irony of the location – Twitter is a rising internet source of news itself. He points out of the window to his own apartment building 100 yards away.
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