Valence becomes the first decisive geographical and procedural turning point in the investigation of the Petit-Clamart assassination attempt. On the main road from Paris to Marseille, south of Lyon, a routine checkpoint outside the town turned a man travelling without identity papers into the lead that gave police names to pursue. The discovery began not with a dramatic raid but with an ordinary document check—and, after questioning continued in Valence, opened into a much wider account of the conspiracy.

Setting and the checkpoint

On September 3, police stopped a private car containing four men at a roadblock outside Valence. Officers had already checked hundreds of vehicles that day. The distinguishing circumstance was simple: one passenger had no papers and said he had lost them. Police took all four men to Valence for routine questioning, where it became clear that the other three had merely offered the stranger a lift. They were released, leaving the fourth man as the focus of the inquiry.

The location matters because the stop arose from an established practice of checking identity papers on a major road, rather than from specific intelligence about the car. Valence is presented as an initial processing point: officers took fingerprints there and sent them to Paris to verify the name the man had supplied. The check did not immediately expose an invented identity. The name, Pierre-Denis Magade, was accurate; it was the fingerprints that disclosed the relevant history behind it.

Identification and questioning

The reply from Paris arrived twelve hours later. The fingerprints belonged to a twenty-two-year-old deserter from the Foreign Legion who faced military charges. Magade was then taken to the regional headquarters of the French Judicial Police at Lyon. Valence therefore marks the first identification in the sequence, while the next stage of interrogation took place elsewhere; the distinction makes the town a hinge between a routine roadside check and a formal investigation.

While Magade waited in an anteroom at Lyon, a police guard casually asked him about the Petit-Clamart assassination attempt. Magade shrugged and agreed to answer questions. The exchange transformed the meaning of the earlier checkpoint discovery: the man whose papers had initially been missing was not merely a deserter whose identity needed confirmation, but a participant able to provide information about the attack.

From a roadside lead to a wider manhunt

Magade spoke for eight hours as officers listened and stenographers filled notebooks. By the end, he had named every participant in the Petit-Clamart assassination attempt, along with nine others who had played lesser parts in planning or obtaining equipment—twenty-two people in all. The account describes the consequences in terms of a changed investigative position: before the disclosure, police were pursuing an unknown set of people; afterward, they knew whom they were looking for.

The wider pursuit did not capture everyone. Georges Watin escaped and was never caught. That outcome places a limit on what the Valence breakthrough achieved: it supplied the investigation with names and set the hunt in motion, but did not ensure that every person implicated would be found. In the narrative’s procedural chain, Valence is significant precisely because an unexceptional roadblock produced the first concrete lead, which could then be checked against records, carried to Lyon, and developed into an extensive confession.