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Hello. You did not inform the poem to which this question refers, which makes it impossible for it to be answered accurately. however, I will try to help you in the best possible way.
It is only possible to know who the speaker is advising with reading the poem, however, if the speaker does not quote someone during the poem, it means that he is advising the reader. It is possible to know that the speaker is giving advice if the poem presents imperative phrases, which are stages in which the speaker makes requests or gives advice. These sentences are usually ended with an exclamation mark (!).
"The Time Machine, by H. G. Wells" was written in the year 1895.