Livy VIII, 12, 7: Pedanos tuebatur Tiburs, Prænestinus Veliternusque populus, etc. Livy VII, 12, 8: quod Gallos mox Præneste venisse atque inde circa Pedum consedisse auditum est. Livy II, 39, 4; Dion. Hal. VIII, 19, 3; Horace, Epist, I, 4, 2. Cluverius, p. 966, thinks Pedum is Gallicano, as does Nibby with very good reason, Analisi, II, p. 552, and Tomassetti, Delia Campagna Romana, p. 176. Ashby, Classical Topography of the Roman Campagna in Papers of the British School at Rome, I, p. 205, thinks Pedum can not be located with certainty, but rather inclines to Zagarolo.
There are some good ancient tufa quarries too on the southern slope of Colle S. Rocco, to which a branch road from Præneste ran. Fernique, Étude sur Préneste, p. 104.
C.I.L., XIV, 2940 found at S. Pastore.