Document 3JyMdOGkjX44BLLGYGYMe4yea

"1 COPY bees. R.l. Keller S.P. Wheeler R.A. Baxter JUW 9 iggg "Pair View", Hoghatch Lane, Folly HIU, Farnham, Surrey. 13 th llay, 1969. | j 1 ' Hr. J. O'O. Tattoo, Laboratory of the Governaent Chemist, Cornwall House, Stanford Street, London, S.V.l. Dear Tatton, Hy colleagues Drs. Keller and Wheeler Join with se in expressing our best thanks to you and Hr. Collins for the frank discussion at Honsanto House on Hay 1st. I have now received reprints of the following publications which you promised to make available to us:- (1) "Organoohlorine Peetlcides in the Atmosphere" by D.C. Abbott, R.B. Harrison, J.O'G. Tatton and J. Thompson: Nature, July 16th 1966, pp 239-261. (2) "Organoohlorine Pesticides in the Atmospheric Environment", by the same Authore: Nature, December 23th 1965, pp. 1317-1318. (3) "Chlorinated Hydrocarbons in British Wildlife" by D.C. Holmee, J.H. Simmons and J.O'G. Tatton: Nature, Ootober 21st 1967. (4) "Organoohlorine pesticides in Rainwater in the British Isles" by K.R. Tarrant and J.O'G. Tatton: Nature, August 17th 1968. Please accept ay best thanks for this further service to the enquiry we are making. As you know, our enquiry is in the early stages and we are pummled to know how the PCB contamination has occurred. Jensen's observation that contamination was first detectable in birds collected in 1944 could possibly be significant, as it suggests that the large-scale destruction of stores of all kinds by burning and slaking could be the most likely cause. Presumably consideration has been given to this possibility in the corresponding Investigation of pesticidal contamination, although to date nobody appears to have mentioned it, and it has not cropped up in any of our recent discussions. Your comments would be greatly appreciated. Yours sincerely, D.V.N. HARDY HONS 090656