Note 6 — VIII. Speech and Writing
H. W. (Henry William) Auden translation
latus is never used in the singular in good Latin with the meaning "lungs,", "breath," "vigour," cf. Cic. iam me dies, vox, latera deficient si... In a somewhat similar way lacerti is used of oratorical vigour, e.g. ipse hastas...oratoris lacertis viribusque torquebit (De Or. 1. 57. 242).