Original sentence: Darwin held Gray in high esteem: he dedicated his book Forms of Flowers to Gray and he wrote in 1881 "there is hardly any one in the world whose approbation I value more highly than I do yours" Gray, considered by Darwin to be his friend and "best advocate", also attempted to convince Darwin in these letters that design was inherent in all forms of life, and to return to his faith
Edited sentence: Darwin held Gray in high esteem: he dedicated his book Forms of Flowers to Gray and he wrote in 1881 "there is hardly any one in the world whose approbation I value more highly than I do yours"  Gray, considered by Darwin to be his friend and "best advocate", also attempted to convince Darwin in these letters that design was inherent in all forms of life, and to return to his faith