εἰργάζοντο λογάδην φέροντες λίθους καὶ ξυνετίθεσαν ὡς ἕκαστόν τι ξυμβαίνοι → they went to work bringing the stones as they picked them out and put them together as each one happened to fit
sēmĭ-cŭbĭtālis: e, adj. cubitum,
I a half-cubit long: hastile, Liv. 42, 65, 9.