si forte: etc. a bit of colloquial politeness; cf. Ter. Ad. 806 “ausculta paucis, nisi molestumst, Demea” ; Cic. Cluent. 60.168 “tu autem, nisi molestum est, paulisper exsurge” ; Mart. 1.96.1 “si non molestum est teque non piget … dicas.”
 campo minore: probably so called to distinguish it from the great campus Martius; and Paulus (Fest. p.131) mentions a campus Martialis on the Caelian, where horse-races were held when the Tiber overflowed the campus Martius (cf. also Ov. Fast. 3.519ff.). This is possibly the place meant, as the search passed from it through the Circus Maximus, by the shops near the Forum (cf. Catul. 37.2n.), over the Capitoline, to Pompey's portico in the Campus Martius. There were yet other campi; cf. Prop. 3.23.6 “campo quo movet illa pedes?” Not. et Cur. App. I. Campi VIII., etc. On the ablative without in cf. Ovid and Prop. ll. cc.; Liv. 21.8.7 “iustae acies velut patenti campo constiterant” .
 templo summi Iovis: the triple Etruscan temple of Jupiter Capitolinus with Juno and Minerva ascribed to Tarquinius Priscus, was burned in 83 B.C. Sulla began, and Q. Lutatius Catulus in 69 B.C. completed, the new temple, which was itself burned in 69 A.D. under Vitellius (cf. Tac. Hist. 3.72).
 Magni ambulatione: in the summer of 55 B.C., the year of his second consulship, Pompey threw open to the public his stone theatre on the Campus Martius, with a magnificent porticus adjoining it in the rear of the stage. He is frequently mentioned by his contemporaries under the title Magnus, conferred by Sulla in 81 for his African victories.
 Cămerium: the first foot is an iambus, with the second syllable long by position of its vowel before r followed by consonantal i; for a resolution of the normal trochee in a tribrach in this meter would be unique. With the construction (sc. reddite?) cf. Catul. 38.7.
 The general character of the gesture is clear, despite the difficulty of emendation. See Crit. App.
 Herculi labos est: with the figure cf. Prop. 3.23.7 “ubi pertuleris, quos dicit fama, labores Herculis.” The genitive in -i from Greek proper names in -es is not infrequent in the earlier period and in Cicero.
 The sportive manner of the girl (vv. 11-12) has awakened the poet's suspicions, and he is anxious to learn the truth from his friend's own lips.
 lacteolae: apparently not occurring again till Aus. Epist. 7.2.46 “carnem lacteoli visceris” (of an oyster), where it plainly = candidi (cf. Catul. 64.65 “lactentis papillas” ; Hor. Carm. 1.13.2 “lactea Telephi bracchia” ); see, then, Catul. 13.4n. candida puella.
[18-20] With the sentiment cf. Catul. 6.1ff.
[21-22] The poet declares himself, however, more interested in the true happiness of his friend than in the satisfaction of his own curiosity.