Quire 13

[Linda]

This finding could lead to the assumption that the nymphs themselves are partly the embodiment of "substances". The "headband" could be a kind of marker in which state the individual nymph is currently.
For example, the red "headband" could stand for heating, not only a state but a process.

I do agree that the nymphs are the embodiment of substances, but for me they are literally water nymphs, the substance  being water. 

I see the adornments as more descriptive in nature. Further mnemonics within the water nymph mnemonic itself, related to the main mnemonic device being employed.

I agree with the heat connection, although as i mentioned there could be other connotations.