Excel mail merge ?

In each column on Page 1 of an Excel spreadsheet, I am listing a number of variables from A4 to A64. Each column is identified by a number in cell A1

The contents of each column will translate into allotted positions in a letter on Page 2.

I would like the contents of those allotted positions to change depending on the identifier number in cell 1 of each column, much like a Mail merge record,
so that if the letter had an identifier number of, say 245, the allotted positions will be filled by the data in column 245.

Non sensitive document attached