[3] He also held several one-man shows of his work, and produced the artwork for Bajan novelist George Lamming's first book In the Castle of my Skin.

From the beginning of his studies, he was aware of potential disturbance of stratigraphy, errors in radiocarbon dates, and other pitfalls, and some of his efforts to detect them were detailed in Early Pottery on the Amazon: A Correction.

[5] His observation that the methods employed by the Warao for processing palm starch are preadapted for eliminating the poison from bitter manioc offers a reasonable explanation for the origin of this remarkable technology.

[6] A monograph detailing his evidence and interpretations of the interaction between environmental change and Guyana prehistory was in press at the time of his death.

[3] In 1986, Williams and his assistant, Jennifer Wishart, initiated a programme for junior archaeologists in Guyanese secondary schools.