Text uses both "Nelson" and "Nielson"; may or may not be the same person.
Text uses both "Eberhart" and "Eberhardt"; probably the same person.
Text uses both "MacMaster" and "MacMasters"; they appear to refer to the same person, "Ted P. MacMaster", but none of these has been changed.
Page [92]: "Mr. Stevenson, my name Leon Hubert." is missing the word "is".
Page [97]: "were in the basement; we" was printed with the semi-colon.
Page [104]: "I directed by attention" is misprint for "my".
Page [124]: Quotation marks in the paragraph beginning "Closing the quote" were printed as shown here.
Page [180]: In "10:50 approximately 10:50", the second one was printed as "10.50"; changed here.
Page [180]: "onduty" may be misprint for "on duty".
Page [207]: "Do you solemnly swear" was misprinted as "your"; changed here.