Special Kana in Man'yōgana?


Probably a dumb question, but I'm wondering how certain sounds would be
represented in Man'yōgana. Places like Wikipedia have charts that show the
normal Kana and their kanji equivalents, but they don't show how sounds like
ん, っ, or voiced consonants (d-, z-, b-, g-, etc.) would be represented. Would
the か and が moras be represented by the same kanji? How would 促音 be
represented?




Note the following is based on web searches.

**濁点**

Mostly different kanjis were used for those pairs. E.g.
か：加、迦、訶、下、日、賀、河、鹿、甲、川、蚊、乎、家、香、華、可、夏、化 and が：賀、之、髪、何、加、鹿、迦、我

See the full list below.

  * [万葉仮名一覧](http://www1.kcn.ne.jp/%7Euehiro08/contents/kana/1ran.htm)

**ん(撥音)**

There was no fixed notation for ん.

A simple description is that up to Heian period (- late 12C) there were
fluctuation in writing ん, which was expressed by ム/二/ウ/イ or just left out.

> 平安時代には撥音の表記法が不安定で ①無表記 ②厶を宛てる ③二を宛てる ④ウを宛てる ⑤イを宛てる
> の五通りの表記が行われたことが知られていますが、その一部は上代にまで遡るということでしょう。

  * [万葉仮名で「ん」に相当するものはないのでしょうか。](https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q13219979388)
  * [万葉仮名に「ん」はなかったのでしょうか？](https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q13155683788)

**小書き文字/拗音**

It is said these did not exist in native Japanese, and as such there was no
notation for them in 万葉仮名.

  * [万葉仮名で「ちゃ」の「ゃ」とか、「しゅ」の「ゅ」の様な「小文字」の表記はどの様になるか教えてください](https://detail.chiebukuro.yahoo.co.jp/qa/question_detail/q12169947092)

Also note that even just 100 years ago 小書き文字 was not used: E.g., 帰った was
written 帰つた although this is a matter of notation, not of existence of sounds.

