Original sentence: The book was the first volume of three on the geology he had investigated during the voyage, and was widely recognised as a major scientific work by the young geologist, presenting his  deductions from all the available observations on this ambitious subject
Edited sentence: The book was the first volume of three on the geology he had investigated during the voyage, and was widely recognised as a major scientific work by the young geologist, presenting his masterful deductions from all the available observations on this ambitious subject