Attempts have been made from a study of the changes produced by mutation to obtain the relative order of the bases within various triplets, but my own view is that these are premature until there is more extensive and more reliable data on the composition of the triplets.
Well I tried to, but I could never write anything that I liked or was worthwhile. I threw it all out and realized that I had to make a serious study- that my tastes were far more advanced than my abilities.