Conversation so far:
What did Marie Stopes research ?
During Marie Stopes's time at Manchester, she studied coal and coal balls and researched the collection of Glossopteris.
Did someone help Marie Stopes with her research?
Did Marie Stopes meet anyone of note during the time of her research ?
A chance meeting with Antarctic explorer Robert Falcon Scott in 1904 brought a possibility of Marie Stopes proving Edward Suess's theory concerning the existence of Gondwana or Pangaea.
What did Marie Stopes do with Robert Falcon Scott?
Marie Stopes's passion to prove Edward Suess's theory led her to discuss the possibility of joining Robert Falcon Scott's next expedition to Antarctica. She did not join the expedition.
Are there any other interesting aspects about the Marie Stopes article besides her possibly joining Robert Falcon Scott's next expedition to Antarctica?
During World War I, Marie Stopes was engaged in studies of coal for the British government, which culminated in the writing of Monograph on the constitution of coal.

Question: Who did she write Monograph on the constitution of coal for?
Self-contained rewrite: Who did Marie Stopes write Monograph on the constitution of coal for?