In the Oakland Tribune of April 2, 1971, there appeared "Most Common Typo" in the Ann Landers column, a tale of suspected typewriter crime. It seems that a frantic father had written to Ann about a letter that his wife, in her sixth year of analysis, had received from her 18-year-old daughter, who was away at college.
"The Tell-Tale Typewriter,"
Word Ways: Vol. 26
, Article 8.
Available at: http://digitalcommons.butler.edu/wordways/vol26/iss4/8