"Old Mill at Sam Houston Park (postcard)." (1910): http://hdl.handle.net/1911/36919.
In the early 1900's a greenhouse was built on the park grounds where gardeners grew the exotic plants used in the lavish landscaping. The landscaped grounds included a water mill and several small lakes.
Except where otherwise noted, this item's license is described as This image is in the public domain and may be used without requesting permission, but should be cited as "From the Heritage Society, Houston, Texas." http://creativecommons.org/licenses/by-nc/3.0/us/