Lethusian Syllabary

For my conworld.

Classical Lethusian is written from right to left on rows scripta continua, that is, without space between words. If necessary, the word border mark is used. The writing system is a syllabary: one grapheme corresponds to a set of sounds (onset and rime) forming a syllable. All syllables of the particular language require a consonantal onset (no word-initial vowels).

The chart shows old monumentals/runes (regional, 3000 BP), classical majuscules (standard, 2000 BP; not showing obsolete additions) and cursive handwriting (vernacular, 1000 BP) of Central Lethusian. Sounds correspond to the post-classical language after the Fall of Grehtkeepers after 6:138 (1410 BP). Modified versions of the script are still in use among Lethusian daughter languages and their neighbours, which will be demonstrated later. 


Number system is base desimal, but their symbols are the same as syllable graphemes (compare e.g. Classical Greek). Larger values precede (rightmost) the lesser ones i.e. symbol for (1000) comes before that of (10). Negative numbers are formed by inverting the order. If there is only one negative number symbol, "No vowel" diacritic is used to indicate its negativity.

One thing to note is that even powers of ten appear twice; the symbol #1 ending the series of same power is used a stand-alone (or final) number whereas the symbol #2 beginning a new set is used when accompanied with other numbers. Example: "I have (10#1) apples, but you have (10#2)(4) [=14] of them."

Diacritics as arithmetic symbols:
- Question diacritic as "equals" sign, placed under the first symbol of the result.
- Word separator between numbers to be summed or subtracted: (10)(1).(2)(10)?,(1) [11-12=-1]
- Abbreviation mark between factors to be multiplied: (2)z(3)?(6) 
- Fractional number utilized in multiplication to get division but "no consonant mark can be used in the first grapheme of the divisor (follows dividend).
- For exponentiation, the abbreviation mark is used twice: (2)zz(3)?(8)
- Multiplication and expononentiation used also for numbers larger than 1M, and the compound may be placed in quotes: '(10k)zz(2)'

Fractional number symbols come last. Symbol for 'a is utilized as a decimal point if there is not a fraction small enough; larger number is borrowed from larger powers of ten respectively. Example: (4)(1/1000)z(1/10) ? (4/10)a(10000) [0.4001].