 Keshiraja was a notable writer and grammarian of the 13th century . He came from a family of famous poet @-@ writers . Although five of Keshiraja 's writings are not <unk> , his most enduring work on Kannada grammar , Shabdamanidarpana ( " Mirror of Word Jewels " , 1260 ) , is available and <unk> to his scholarly <unk> and literary taste . True to his wish that his writing on grammar should " last as long as the sun , the moon , the oceans and the <unk> mountain lasted " , Shabdamanidarpana is popular even today and is considered a standard authority on old Kannada grammar . It is prescribed as a textbook for students of graduate and post @-@ graduate studies in the Kannada language . Although Keshiraja followed the model of Sanskrit grammar ( of the <unk> school ) and that of earlier writings on Kannada grammar ( by King <unk> I of the 9th century and grammarian <unk> II of 1145 ) , his work has originality . Keshiraja 's lost writings are <unk> <unk> , Sri <unk> , <unk> , <unk> and <unk> ( or <unk> ) . 
