To prevent myself from making a mistake, Marvin specifically inquired about the performance time of "A Midsummer Night's Dream" and, after confirming that it didn't coincide with the one he attended, he pondered for a moment before sharing a piece of information.
"To make contact with Helena Sheffield, I went to the Covent Garden Royal Opera House for a performance, which was also 'A Midsummer Night's Dream.' At that time, in Box 2, I saw Professor James Morea and Guy Moran," he said.
"Could 'A Midsummer Night's Dream' be their secret code for meeting?" Holmes immediately speculated, "James Morea must be meeting his subordinates based on the day's performance! As soon as 'A Midsummer Night's Dream' is published in the newspaper, they would meet at the theatre!"
"Hmm... It's not impossible. Meeting at a theatre indeed carries an air of mystery. We can verify this possibility," he mused.
