Avestan Ee and the Consistency of the Length Marking

Every vowel in this alphabet has its length written, and this letter is the long member of the e pair. The consistency matters more than any individual sign: a script that marked length only sometimes would leave a reciter guessing on the occasions when it did not. Vowel writing is the innovation that separates this alphabet from everything else written in Iran at the time. The letterforms are Pahlavi and the right to left direction is Pahlavi. The vowels are not: they are full letters, and they come first in the order.

No Avestan manuscript survives from earlier than the thirteenth century of the common era. Every copy in existence is therefore many centuries younger than the alphabet, and the alphabet is many centuries younger again than the words. What reaches a modern edition has passed through both gaps. In the digital record the letter is encoded at U+10B09 AVESTAN LETTER EE. The whole Avestan block lies above the Basic Multilingual Plane, so each character needs a surrogate pair in the encodings that use them, and a font carrying the script is required before anything appears on a screen at all. What this alphabet holds is a performance. The atlas describes it and does not instruct in it: the recitation belongs to the community that maintains it, and the interest here is in what the script was built to do and how well it did it.