Research Projects is not as robust as it might be. It seems that Evans intentionally destroyed some of his papers. Thus, no personal records survive of his most important research findings, or of his consultative work for government and industry in the earlier part of his life, and the existing documents are essentially confined to those which accumulated after this major clear-out in the 1960s. The remaining material has its interest in documenting Evans's lifelong concern - no doubt continuing that of his father Richardson Evans - for the conservation of the natural environment, whether by the use of windmills to replace or supplement fossil fuels, or by his somewhat less than practical scheme to foster economical and nutritious home baking which greatly occupied his time and tea parties in his last years (see B.17 - B.31 and introductory note).