The original spreadsheet is 060211, some of its columns were deleted and some were added to create the secondary combine_individuals_letters (lets call it CIL) spreadsheet (also all the rows where Kircher is the author and all rows which are not letters were deleted from 060211 for CIL. I would suggest to combine them by adding columns J-Q from CIL spreadsheet into 060211 but as you see now some rows that are in 060211 are missing in CIL (this was because we wanted only letters sent to Kircher by then). So I have no idea, if this combination is possible or how it is difficult. I have a home office today so I will be online from about 6 AM until 9 AM your time but probably also later.
The original spreadsheet is 060211, some of its columns were deleted and some were added to create the secondary combine_individuals_letters (lets call it CIL) spreadsheet (also all the rows where Kircher is the author and all rows which are not letters were deleted from 060211 for CIL. I would suggest to combine them by adding columns J-Q from CIL spreadsheet into 060211 but as you see now some rows that are in 060211 are missing in CIL (this was because we wanted only letters sent to Kircher by then). So I have no idea, if this combination is possible or how it is difficult. I have a home office today so I will be online from about 6 AM until 9 AM your time but probably also later.