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PRODID:-//Santa Cruz Valley National Heritage Area - ECPv6.17.3.1//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Santa Cruz Valley National Heritage Area
X-ORIGINAL-URL:https://santacruzheritage.org
X-WR-CALDESC:Events for Santa Cruz Valley National Heritage Area
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
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BEGIN:VTIMEZONE
TZID:America/Phoenix
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TZOFFSETFROM:-0700
TZOFFSETTO:-0700
TZNAME:MST
DTSTART:20250101T000000
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BEGIN:VEVENT
DTSTART;TZID=America/Phoenix:20260923T103000
DTEND;TZID=America/Phoenix:20260923T120000
DTSTAMP:20260908T212533Z
CREATED:20260908T212533Z
LAST-MODIFIED:20260908T212533Z
UID:10008024-1790159400-1790164800@santacruzheritage.org
SUMMARY:Heliograph:  Frontier Arizona's Communication by Sunlight
DESCRIPTION:Join the Oro Valley Historical Society as we hear from retired CIA Intelligence Analyst\, Lee Krsiean\, an Oro Valley neighbor\, talk about early communication way before texting!  The presentation is free\, and donations to the Oro Valley Historical Society are most welcome.\n\n\nCommunication across long distance using reflected light signals\, probably was used by pre-Columbian natives in Arizona.  During the 1880s in Arizona\, United States Army soldiers used high-quality light reflecting heliographs for communication and security for early settlers.
URL:https://santacruzheritage.org/event/heliograph-frontier-arizonas-communication-by-sunlight/
LOCATION:Oro Valley Public Library\, 1305 W Naranja Dr\, Oro Valley\, AZ\, 85737\, United States
CATEGORIES:History,Lectures,Presentations
ATTACH;FMTTYPE=image/jpeg:https://santacruzheritage.org/wp-content/uploads/2026/09/heliograph2.jpg
ORGANIZER;CN="Oro Valley Historical Society":MAILTO:secretary@ovhistory.org
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