Answer:
There aren't. You have found all the adverbs in the passage:
1. slowly
2. quietly
3. beautifully
4. loudly
Explanation:
An adverb is a word that modifies a verb, an adjective or another adverb. It is common for adverbs to have -ly at their endings, but that will not necessarily be the case with all of them. Some examples of adverbs are: well, quickly, early, sweetly, etc.
Let's focus now on the adverbs found in the passage and the words they are modifying:
1. slowly --> modifies the verb "walked"
2. quietly --> modifies the verb "moved"
3. beautifully --> modifies the verb "playing"
4. loudly --> modifies the verb "playing" in a different sentence
