Answer
Edmund Gunter, a key figure in mathematics and navigation during the 16th and 17th centuries, greatly influenced William Oughtred's work. Gunter developed innovative logarithmic scales, known as Gunter's scales, which enabled swift calculations and measurements. Oughtred extensively utilized these scales in his own mathematical and instrumental innovations, notably his invention of the slide rule. The influence of Gunter's logarithmic concepts and methods permeates Oughtred's contributions to mathematics and instrument design.