"Thence, we proceeded to the next town on our itinerary."
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The word 'thence' is an adverb; modifying a verb as from a place or source previously mentioned (We drove to Vermont, thence to Maine.); as a consequence (the neighborhood is old wooden structures, thence combustible.)
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"Thence" means from that place or from that time. It is often used to indicate a source, origin, or starting point for something.