Copy of referee's comments by R A [Ronald Aylmer] Fisher on two papers, 'The action of radiations on bacteria. IV - the lethal action of soft X-rays' and 'The action of radiations on bacteria. V - the target theory', by R B Haines and D E Lea Paper reference code: B.68 and B.69 [Typescript copy of comments made on RR/W/7/40]. The experimental results in paper IV should be put on record if they are sound, despite the low precision of the data. Sees no reason for the extensive discussion of 'target' regions in paper V. [Not published]. [January 1939]