Text C is held in the general archives of the Padri dei Sacri Cuori (SSCC), Casa Generalizia, Via Rivarone 85, I-00166 Rome, Italy.
One of Florentin-Étienne Jaussen's tablets, Mamari was apparently collected on Easter Island by Father Gaspar Zumbohm in 1870 and sent to him in Tahiti.
It was sent to the headquarters of the Congrégation des Sacrés-Coeurs et de l'Adoration (SSCC) in Paris, where it was deposited in the Missionary Museum, either by Jaussen in 1888 or by the French navy in 1892 after his death.
He identifies it with a tablet called Kouhau ꞌo te Ranga that had belonged to the ꞌariki Ngaꞌara, was stolen by his servant, who gave it to a friend, whose son sold it to Zumbohm.
Two and a half of the fourteen lines on the recto have been shown to include calendrical information; Guy suggests possible phonetic readings of some of the glyphs in this section.
Jaussen's informant Metoro Tau‘a Ure started his 'reading' of the tablet at the bottom of the verso, contradicting Pozdniakov's determination of the order.