The directory/catalogue merge tools won't combine multiple records into a single table cell. If you want that, you'll need to re-organise the source data, so that each record (i.e. 'box') has all its data on the same row, with different project, sample & date headers for each item. Either that, or you'll need to use a macro-driven process in Excel to automate & populate the Word document, without recourse to mailmerge.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]