What is Henry Louis Vivian contribution to English poetry?

There seems to be a misunderstanding. There is no known English poet named "Henry Louis Vivian".

It's possible you are thinking of:

* Henry Louis Gates Jr., a prominent African American literary scholar and critic. He has written extensively about African American literature and culture, but not poetry.

* Henry Wadsworth Longfellow, a famous American poet. While he is known for his contributions to American poetry, he was not British and thus not directly associated with English poetry.

Could you please clarify the name or provide more context so I can better assist you?