When using any locally-created index to records, determine how the pages in the index are organized. Some indexes are strictly by first letter of last name. Some indexes are like the one in the illustration where first names are used to create the index as well (the image shown us the section where both the first and last names start with an “H”). Other indexes have slightly different structure
Do not just start looking for your names without first knowing how the index is structured. This often leads to confusion and a failure to use the index properly.