This volume brings together a selection of revised papers, originally presented at ICHoLS IX (São Paulo/Campinas). The papers in the first section deal with studies ranging from the Latin model in post-Renaissance grammars to new scientific propositions at the turn of the 19th century; the second part carries articles devoted to a variety of topics in 19th and 20th century linguistics; and in the third section are united papers based on plenary presentations, ranging from ancient Greek reflections upon language to developments in Brazilian linguistics beginning with the implantation of structuralist work by Joaquim Mattoso Câmara (1904–1970) in the 1960s. In the concluding contribution, a survey of advances in the history of the language sciences is offered.