Conversation so far:
Who was Rosalie in relation to Harry Price?
Rosalie was a six year-old that appeared when Harry Price attended a private séance on 15 December 1937.
What, according to Harry Price's account, did Rosalie say or do?
During the séance Rosalie only said yes when asked whether she loved her mother.
What happened after Rosalie spoke to Harry Price during the séance?
A Madame Z hugged Rosalie, her alledged daughter and the entire séance group cried.
Did Rosalie do anything to Harry Price?
Rosalie observed Harry Price asking her a series of questions.

Question: Did he write about this event?
Self-contained rewrite: Did Harry Price write about Rosalie's séance?