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SANTA ROSA (KCBS) – A big piece of Silicon Valley history was lost to the fires in the North Bay.

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An archive consisting of over one hundred boxes of the writings of Hewlett Packard founders William Hewlett and David Packard were consumed by flames when wildfires ripped through Santa Rosa three weeks ago.

Hewlett-Packard's co-founders are pictured together in the new corporate offices in 1981, David Packard (left) was chairman of the Board of Directors and William Hewlett was chairman of the Executive Committee. (Hewlett-Packard/Newsmakers)

Hewlett-Packard’s co-founders are pictured together in the new corporate offices in 1981, David Packard (left) was chairman of the Board of Directors and William Hewlett was chairman of the Executive Committee. (Hewlett-Packard/Newsmakers)

The collection was stored at the Fountaingrove headquarters of Keysight Technologies, a company with roots in H-P.

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Keysight acquired the archives in 2014, when its business was split from another H-P spinoff, Agilent Technologies.

The archives included correspondence, speeches and other items, and was appraised in 2005 at nearly $2 million.

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As of Monday morning, both the Nuns Fire and Tubbs fire were 99 percent contained, with full containment expected Tuesday.