Note 037
At indies doctiores nostri facti paravere contra hostes machina menta, quae tamen avare dabantur. Pulvis erat nitri modica exigua; tela modica; bombardæ, si aderant incommoditate loci primum hostes offendere, maceriebus alveisque tectos, non poterant. Nam si quæ magnæ erant, ne murus concuteretur noster, quiescebant.
This passage of Leonardus Chiensis is curious and important.
The History Of The Decline And Fall Of The Roman Empire Fall In The EastChapter 68