>and paraphrased operas like 'The Mikado' with ease. He seems to have misspelled a lot of things in his charming "parody" version of it: https://en.wikisource.

>and paraphrased operas like 'The Mikado' with ease. He seems to have misspelled a lot of things in his charming "parody" version of it: https://en.wikisource.org/wiki/Zodiac_Killer_letter,_July_26th_1970 https://en.wikisource.org/wiki/Zodiac_Killer_letter,_July_26... He also easily could've had a recording or lyrics transcript at hand while writing it, perhaps from a library. Or even if he recounted the structure from memory, he could've just seen the play a lot, or at most he might just have pretty good musical memory. It doesn't necessarily indicate he's especially intelligent or that his rampant misspellings and incorrect grammar are deliberately planted and contain hidden meaning.