Nehemiah 3:19

And next to him repaired Ezer, the son of Jeshua, the ruler
of Mizpah
Either of another Mizpah, or of the other half of Mizpah, ( Nehemiah 3:15 )

another piece;
or a second piece; one of the two pieces; for another is mentioned in the next verse:

over against the going up to the armoury, at the turning [of the wall];
the western wall towards the south, near to which was a place where armour was laid up; perhaps the same with the tower of David, to which there is an allusion in ( Song of Solomon 4:4 ) .