In Search of William Gascoigne

From the reviews:

Sellers has pulled together copious facts on the little-known astronomer William Gascoigne (c. 1612-44). Gascoigne invented the telescopic sight and micrometer, essential instruments for exact measurements in astronomy. The book surveys Gascoigne s life, including the effects of his era s religious and political climate on his education and development. Summing Up: Recommended. Specialist audiences including researchers/faculty and professionals. (M. -K. Hemenway, Choice, Vol. 50 (6), February, 2013)

Sellers book gives a good account of what is known of Gascoigne s work, and also sets the man in his times. historians of astronomy will find it extremely useful. This book has clearly been a labour of love, and it fills an important gap in the history of English astronomy. Sellers has probably told us all that we can hope to learn about William Gascoigne. (Alan Batten, Journal of Astronomical History and Heritage, Vol. 16 (1), 2013)

" David Sellers has done a splendid job of bringing Gascoigne into broader scholarly understanding. . . What I believe makes this book especially valuable is its author' s meticulousness as an archival historian, and the large body of primary research data upon which it stands. " -Allan Chapman, The Observatory October 2013