It is possible find evidence of William Marsh Rice's slave ownership by looking at:
There is a wide variety of possible sources for this topic.
The entire run of Campanile yearbooks are online. Some years include events with participants in blackface. For example:
The Rice Thresher newspaper can be explored for evidence of racist activity over time, as well as protests against such activity.
College records document public parties over time, college governance and policies. These are not generally publicly online but are open for research.
It is hard to say what WMR would have thought of these questions. The records we have of WMR are very business oriented, and do not include personal journals or even many personal letters. We are more able to see what he did, than what he thought.
An example of this lack of clarity can be observed in the Charter Trial Records, where participants try to discover if WMR intended to found vocational school or a research centered school, and the record is not clear.
A rare example of seeing WMR's personal views would be the letter from Rice to Albert Patrick on Aug. 3, 1900 stating that he wanted to be cremated and interred in Wisconsin with his wife. Early Rice Institute Papers, Box 51, Folder 4, call # UA 101, Woodson Research Center.
This is a very difficult question, given that records were not created or maintained on this topic for many years.
Some helpful documents include:
Documents in the archive show that starting in 1922, a committee consisting of President Lovett, William M. Rice, Jr. (nephew of WMR, brother to Benjamin Botts Rice), and Benjamin B. Rice (nephew of WMR, brother to WMR Jr.) began to formulate plans for disposition of WMR's ashes, which to that point had been stored in New York but not interred. We know about the design of the statue, but not exactly where in the pedestal the ashes were placed.
On 28 November 1928, the Board of Trustees appropriated $25,000 for the memorial, commissioning John Angel as sculptor and Cram and Ferguson as architects.
May 22, 1930, the ashes were interred in the pedestal, and on 8 June 1930, the statue was dedicated as part of commencement.
The inscription has been transcribed and translated.
The statue has become a focal point of protest in 2020.
The Racial Geography Project (part of Task Force) looks at events (Rice and Slavery, Events on Campus, Land and the Environment, Construction of Physical Campus / Starting to Identify Workers) that have happened on campus (when and where) to show visually as a map.