Note 117 — Chapter X · Boulton and the Steam Engine—Correspondence with Watt.
Reading edition
Roebuck was at this time willing to admit Boulton as a partner in the patent, but only as respected the profits of engines sold in the counties of Warwick, Stafford, and Derby. This Boulton declined, saying, “It would not be worth my while to make engines for three counties only; but it might be worth my while to make for all the world.”