A.P. Sen, J.- 1. This is an appeal brought by the defendant No.1, M/s Mishrabandhu Karyalaya, Jabalpur and its partners. from the judgment and decree of the 5th Additional District Judge, Jabalpur, dated 31st August 1964, decreeing against them, the plaintiff Sheoratanlal Koshal's claim (A) for recovery of Rs.15,307.04 paise with interest at the rate of 6% per annum thereon from the date of suit, i.e., from 1st January 1963 till realisation, due on account of the arrears of royalty payable to him on the sales effected upto the end of December 1959 of the book entitles 'Saral Middle School Ank Ganit', written by his son-in-law Maniram Vishwakarma, the copy right of which had been assigned to him; (B) for rendition of account of the sales effected by them of the book in question and other allied publications thereof, as per the Hyderabad Syllabus or otherwise, during the years 1960-61-62 and until the date of accounting, so as to ascertain the amount of royalty which had accrued thereon and became payable to him at the rate of 15% of the sale proceeds, (C) for interest at the rate of 6% per annum, on the amount of royalties due each year, payable from 1st January of the follo