> しかし、 **期待を胸に** 中学校に赴任すると、理想と現実は大きくかけ離れていました。

> 加藤さんは **大切な手紙を手に** 再び「パナマ」へ向かいます。

> 彼女は **手紙を手に** 、階下へ降りてきた。

Is に turning these nouns into adverbs?
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2018-01-20T23:54:59.607
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2022-01-22T07:40:22.813
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question
syntax particle-に phrases
Can we turn nouns into adverb by adding に?
None of your examples are being used as adverbs.

Your first example is the fault of lack of comma usage. Read this way:

> 「しかし、期待を胸に、中学校に赴任すると、理想と現実は大きくかけ離れていました。」 But, with my hope in my heart, I
> transferred to junior-high, whereupon my dreams and reality drifted apart
> dramatically. - - - - 胸に = in my heart

The other two examples are the same as far as using 手に (in hand), with one of
them simply not containing a comma.

> 「加藤さんは大切な手紙を手に（、）再び「パナマ」へ向かいます。」  
>  Kato took the important letter in hand, and headed again for Panama.
>
> 「彼女は手紙を手に、階下へ降りてきた。」 She took the letter in hand, and came down to the
> hallway.

Rules for use of commas are not quite as strict as in English. Usage also
varies by writer. Often, where we would expect to see a break in the sentence
there is none. Learning how to parse these types of sentences takes time.

If you do want to change nouns into adjectives or adverbs, use ～的 or ～的に as
detailed [here](http://learnjapanese.becauseofdreams.com/2017/08/10/how-to-
turn-nouns-into-adjectives-and-adverbs-with-%E7%9A%84-%E3%81%A6%E3%81%8D/).

Also recommend that you get used to using「」 for open/close quotes in Japanese.
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answer