Illustrated Companion to the Latin Dictionary/Ferriterium

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

FERRITER'IUM. A prison where slaves were kept in chains. Plaut. Most. iii. 2. 55. Same as ERGASTULUM.