In other news:
|The bead represents H4|
Hope this helped anyone wondering about the alphanumeric references.
The oddest thing about this little drawing is that I sketched it out without thinking, and did not try (in any way) to make it accurate - only representational. It turned out when I labeled it that the rows and columns were exactly right!! Accurate to the numbers in both length and width. Was that uncanniness because I have been living with it over several years? I don't know, but you could have knocked me over with a feather, because I didn't count or plan on it being correct, only 'close enough' to give a good indication for my explanation for Susan.
[cue the crazy coincidental music]