( 1 ) THE defendants are the appellants. Respondents 1, 2 and 3, 4 and 5 being the legal representatives of the second respondent who died subsequently, laid the suit on the foot of the promissory note, Ex. A-9 dated april 15, 1971, executed by the first appellant in favour of the first respondent and the second appellant stood as surety, for a sum of Rs. 50,000/ -. The trial court decreed the suit. Thus, the apeal

( 2 ) THE first respondent-first plaintiff is a partnership firm consisting of 2nd and 3rd respondents. Earlier, the second respondent and her mother, begum Lulu Hasan Nawaz Jung were partners. Their present case is that the first appellant borrowed a sum of Rs. 50,00/- from Bsgum Lulu Hasan nawaz Jung, for short, "the promisee" under Exs. A-5 and A-6 in the year 1968 in sums of Rs. 30,000/- and Rs. 20,000/- respectively and the second appellant endorsed two cheques, Exs. A-7 and A8, which bore initially the date April 1, 1968 but later corrected as July 1, 1968, as collateral security. Before expiry, when demanded, the first appellant executed Ex. A-9 suit promissory note dated April 15, 1971, in renewal of the promissory notes ex. AS and A6 and despite