Two unedited wedge-shaped wooden documents SI 3662 and SI 3663
(= SI P 138/a and SI P 138/б, respectively) are deciphered in this paper. A preliminary
analysis of their content and physical features shows that SI 3663 is very probably the
wedge under-tablet to be bound with the wedge covering-tablet N. i. 17 found by Aurel
Stein at the N. I. site (Niya, China). SI 3662, a king’s instruction issued to Soṃjaka the
Cozbo, is in all probability from the Niya sites, too.