Final answer:
Elsie Roxborough appears to be a figure of historical significance, though the question seems to be misdirected given the reference materials provided. None of the resources mentioned pertain directly to her, but an essay could potentially explore her life within a historical or literary framework.
Step-by-step explanation:
It appears there may be some confusion in the question. Elsie Roxborough was a notable figure for her time, but not directly related to the content provided. It is possible, however, that the question is seeking an essay on a historical figure or an analysis of a literary work.
The reference materials provided, such as those pertaining to Elizabeth Murray and her contributions to Modernist abstraction, or the text 'The Sentiments of an American Woman' by Esther Reed, suggest that a historical or literary analysis might be sought. In knowing who Elsie Roxborough was and understanding her historical context, one could craft an essay exploring her life and significance.