Wright and again John Dury (p. 192). But I am aware that I have dealt
inadequately with what separated the experimental scientists from the
heirs of Paracelsus. I hope this complicated subject will be tackled by
those more competent to deal with it than I.

Secondly, this is not a total account of the origins of the civil war,
obviously, nor even of the non-material factors leading up to it. I deal
only indirectly with Puritanism; I say nothing about the irrational
motives which may have stirred the Parliamentarian rank and file--fear
of Catholicism, prophecies, rumours, and so on. It is far from my inten-
tion to argue that the intellectual trends which I discuss were the only
ones that mattered, or even the most important. I want merely to sug-
gest that they existed, were of some significance, and have been neglected.

One advantage of lectures is that they have no footnotes. In prepar-
ing these for publication, I found that I had made some generaliza-
tions, with intent to provoke, which could not be substantiated without
lengthy digressions or notes. Since my object was not to write a def-
initive work, but with luck to start a discussion, I have ventured to leave
a few such remarks naked of documentation, hoping that readers, and
especially my kindly professional colleagues, will give me the benefit
of the occasion. I have trespassed into the fields of too many experts
not to feel in need of indulgence.

I have drawn a great deal upon the work of others. I am very con-
scious of my indebtedness to Professors B. Farrington, F. R. Johnson,
R. F. Jones, E. G. R. Taylor, L. B. Wright and Commander Waters; and
especially to Dr. S. F. Mason. I owe my interest in the history of science
mainly to the stimulus of his books and articles, and still more of his
conversation during the all-too-brief period when he lectured on the
History of Science at Oxford. Articles by Dr. Mason and Mrs. Joan
Simon in The Modern Quarterly, vol. iv, no. 2 ( 1949), first made me think
about the general theme of this book. I am also grateful to the following
for generous help of various kinds: Mr. C. B. L. Barr, Dr. A. C. Crombie,
Mr. J. G. Crowther, Professor Mark Curtis, Professor A. H. Dodd,
Professor K. H. D. Haley, Mr. and Mrs. G. D. G. Hall, Mr. D. M.
Hallowes, Dr. W. O. Hassall, Mr. Charles Hobday, Dr. H. F. Kearney,
Professor J. Le Patourel, Mr. Jack Lindsay, Professor L. Makkai, Mr.
Dipak Nandy, Mr. Leo Miller, Dr. R. M. Ogilvie, Mr. Christopher
Platt, Mr. Colin Platt, Professor D. B. Quinn, Mr. T. H. H. Rae, Mr.
K. V. Thomas, Professor H. R. Trevor-Roper, Mr. Peter Wallis, Dr. C. V.
Wedgwood and Mr. F. P. White. The Clarendon Press's reader corrected
many careless slips, and helped me to express myself more clearly. Mr.

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