The locative ablative is often accompanied by the prepositions in or sub.
[1300.] III. The Instrumental case denotes that by which or with which a main person or thing is attended ([1356]).
The instrumental ablative is often accompanied by the prepositions cum or cōram.
[1301.] The ablative or locative is sometimes attached immediately to a substantive.
Thus, (a.) sometimes to a substantive which denotes or implies action: as, interitus ferrō, destruction with the sword, like intereō ferrō; see [1307], [1331], 1342, 1376, 1377. (b.) In constructions in which the ablative is due to an older combination with a verb: as, vir singulārī virtūte, a man of unexampled bravery. See [1309] and [1375].
[I. THE ABLATIVE PROPER.]
[The Ablative of Separation and Want, and of Departure.]
[1302.] Verbs of separation take an ablative of the thing from which separation takes place: as,
([a.]) caruit forō posteā Pompēius, caruit senātū, caruit pūblicō, Mil. 18, after that Pompey had to keep away from the market place, from the senate, from highways and byways. adhūc Q. Ligārius omnī culpā vacat, Lig. 4, thus far Ligarius proves devoid of any guilt. egeō cōnsiliō, Att. 15, 1, A, 5, I need advice ([1305]). (b.) Ītaliā prohibētur: nōn tū eum patriā prīvāre, quā caret, sed vītā vīs, Lig. 11, he is kept out of Italy; you want to deprive him not of his country, from which he is debarred, but of life. līberēmus cūrā populum Rōmānum, L. 39, 51, 9, Hannibal’s words when he took poison, 183 B.C., let me relieve Rome of anxiety.