"backtraced" meaning in English

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          "text": "He had accrued a good deal of left-handed Whuffie, and I curiously backtraced it to the occasion of my murder, when Debra's people had accorded him a generous dollop of props for the levelheaded way he had scraped up my corpse and moved it offstage, minimizing the disturbance in front of their wondrous Pirates.",
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