Emily Dickinson Lexicon

LATH, n. [Sax. leth. The signification of this word is not clearly ascertained. It may be from Sax. lathian, to call together, and signify primarily, a meeting or assembly. See Wapentake.]

In some parts of England, a part or division of a county. Spenser, Spelman and Blackstone do not agree in their accounts of the lath; but according to the laws of Edward the Confessor, the lath, in some counties, answered to the trithing or third part of a county in others. – Wilkins.