Note 305 — Chapter XVIII · BATTLE OF JALOLA—REDUCTION OF MESOPOTAMIA—KUFA AND BUSSORA FOUNDED. A.H. XVI. A.D. 637.
Reading edition
The square was set out thus. A powerful archer, from the centre, shot arrows on all four sides; where the arrows reached was the limit, and the square was measured out accordingly. The main streets were 40 cubits wide, the cross ones 20, and the lanes 7.