RISD's Archives contain records for the The Lowthorpe School of Landscape Architecture, you can explore them by selecting the following link, Guide to the Lowthorpe School of Landscape Architecture records , 1887-1954
In addition to the archives of the Lowthorpe School of Landscape Architecture, RISD have items in Special Collections from the Lowthorpe School of Landscape Architecture. You can find these items by entering "Lowthrope Collection" as a keyword search.
Special Collections also contains many items connected the history of Landscape Architecture. Browse this History of Landscape Architecture guide to find more resources.
It is also possible to search through Digital Commons @ RISD for information about the Landscape Architecture department. You can search by using the keyword "landscape architecture." You can also join the community for the Landscape Architecture Department.