In calling the structure of the chromosome fibres a code-script
from where does he draw the idea "code-script"? Is it from the developing information theory of the time? Somewhere else?
There is definitely the idea of a code running in the sense of programming, which was likely not a common conceptualization at the time.
On p. 22 he uses the phrase "law-code" which is likely the closer meaning of code he's using and not the sense of genetic code as understood much later when DNA and the underlying protein coding sequences were unraveled.
Morse code may also be a tangential underlying meaning of his sense of "code" as something unknown but potentially revealable.