Hi Alan,

The grid by default will not show this.  What you could do is to have two columns.  The first will be templated and the template would show field 1 over field 3 in each cell, along with having a header template of the two texts.  The second column could be a bound column showing field 2.

regards,
David Young 

Infragistics is dedicated to helping you solve this issue.  Our team and I have done an initial review of your case and as David mentioned, you could do this with column templates.  You can find more information on the column templates here: http://help.infragistics.com/NetAdvantage/ASPNET/2012.1/CLR4.0/?page=WebDataGrid_Column_Templates.html

Here is also a sample for using cell and column templates: http://es.infragistics.com/products/aspnet/sample/data-grid/using-cell-and-column-templates

If you need any further assistance with this please let me know and I'll be glad to help.