This work turned out to be the first really effective one of Benezet's writings, creating not a little sensation both on this continent and Europe. It was especially rousing to the Quakers here and abroad. The Yearly Meeting of London recommended in 1785 that all the quarterly meetings give this book the widest circulation possible. The Quakers in various parts accordingly approached numerous classes of persons, all sects and denominations, and especially public officials. Desiring also to reach the youth the agents for distribution visited the schools of Westminster, the Carter-House, St. Paul's, Merchant Tailors', Eton, Winchester, and Harrow. From among the youths thus informed came some of those reformers who finally abolished the slave trade in the English dominions. The most effective of Benezet's works, however, was his "_An Historical Account of Guinea, its Situation, Produce, and the General Disposition of its Inhabitants, with an Enquiry into the Rise and Progress of the Slave Trade, its Nature and Calamitous Effect_." This volume approached more nearly than his other writings what students of to-day would call a scientific treatise. The author devoted much time to the collection of facts and substantiated his assertions by quotations from the standard authorities in that field. While it added nothing really new to the argument already advanced, the usual theories were more systematically arranged and more forcefully set forth.[39] "This book," says a writer, "became instrumental beyond any other work ever before published in disseminating a proper knowledge and detestation of this Trade."[40]