Setjat = 100x100 royal cubit
Plethra = 100x100 feet

"A set of fractions obtained by halving , like the fractions of the corn measure, was used in connection with the st't, the Greek 'aurora'. This was a measure of 1 square Khet or 100 cubits squared...."
Gardner - Egyptian Grammar P.200

[1 See PSBA 14,410; SETHE, Zahle worte 74; MOLLER, Hieratische Palao-graphie, i. p.65]
- Proceedings of the society of biblical arhcaeology - London 1879-1918
[2 Urk. iv. 6,8. 15]
- G Steinddorff. Urkunden des agyptischen altertums. Leipzig 1903-1917
[3 Siut I, 313]
- F Griffith. The inscription of Siut and Der Rifeh. London 1889.
[4 sebekn. 7 qu. 262]
- The tomb of sebeknekht. Wall drawings and monuments of El Kab. London 1896