Radio Magdala mentions some activity involving Henri Boudet:
"[This] little-known story is quite authentic. Trust [which was] willingly given to Father Henri Boudet, the priest of Rennes-les-Bains, earned him one day a visit from a notary Toulouse. He was invited to choose from among the people of his parish, three or four citizens on whom he could rely. Together [they] bought certain parcels of land - all located on the territory of the municipality designated in advance. The most amazing thing is that these areas were in scrubland or uncultivated hillsides. Of course, the notary provided the funds for these purchases. Boudet found buyers to formalise these transactions. Obviously, purchased land became the property of those whose names were on the deeds. The matter was dropped when, barely a year later, Boudet learned of the death of the notary of Toulouse. While walking on a country road, he was killed by a stone [that] had hit him in the head. Crime or accident? We never identified the perpetrator*. Stranger still, a check in the Cadastre showed that all the parcels of land in question did not belong to the buyers at the time, and in a short time, they passed into other hands. A folder exists on this thorny matter.
* It should probably be noted that this matter gave rise to a rumour that in 1973, Maurice Guinguand, who in his book The Gold of the Templar's (Robert Laffont, ed.) says that in 1884 (sic), the Abbé Saunière, during a hunting party, pushed into an empty hole [?] a notary who had previously presented scrolls, about a secret hidden in the church of Rennes-le-Château. The two men had a disagreement on sharing profits.
From:http://radiomagdala.blogs.midilibre.com/archive/2013/02/14/une-etrange-operation-fonciere.html