Zodiac items in the Mid Peninsula, October and November 1969:

Oct 20, 1969 Someone identifying themselves as Zodiac calls the Palo Alto Times; says he is “leaving the city because I am too hot”.
Palo Alto Times – October 21, 1969  (paywall)

Oct 24, 1969 The Stanford Daily runs a Message To The Zodiac Killer editorial. In the editorial, Zodiac is invited to the next Daily staff meeting.
Stanford Daily – October 24, 1969 – p 2 – Message To The Zodiac Killer

Also on Oct 24, 1969, the Berkeley Tribe runs: A Message For The Zodiac Killer, written by Blaine. Blaine is the main accuser of Richard Gaikowski, who has stated that he wrote his editorial at the request of Gaikowski.
Berkeley Tribe – October 24, 1969 – p 10 – A Message For The Zodiac Killer

Oct 30, 1969 A complete working bomb mechanism with timer and igniter, but packed with dirt instead of explosives found at the Willow Road Bridge on the Stanford campus.
Stanford Daily – October 31, 1969 – p 1

Oct 31, 1969 Zodiac-Mikado coincidences appear in the Stanford Daily, along with an article about the bomb hoax of the day before.
Stanford Daily – October 31, 1969 – p 2 – Letter to the Editor
Stanford Daily – October 31, 1969 – p 4 – Mikado Review
Stanford Daily – October 31, 1969 – p 4 – The Electric Zodiac review, with ‘Electric” missing from the photo, leaving just “The Zodiac.”

Nov 4, 1969 Someone identifying themselves as Zodiac calls the Palo Alto Police Department saying he is coming on the Stanford campus.
Stanford Daily – November 5, 1969 – p 1