From a Houdini diary at the Ransom Center
The pencil writing is the last entry Houdini made noting his lecture at McGill College and an injury. The writing in ink was added in 1927 by his wife Bess. It is interesting first in that she is writing to him "I will carry on dear one - until I meet you again". Also of note, she had dined out at the Village Grove but came home early apparently having neither a "drink or weed". Marijuana wasn't illegal in the United States at the federal level until 1937. The nature of the "horrible box" remains a mystery.