After consultation with AC, and some data cleanup, I've removed some old fields that were no longer used:

• Text
• Illustrations
• OLD Illustrator
• Links
• Page-image Notes

as well as the old poem_search table.

ALTER TABLE `poems` DROP COLUMN `po_text`;
ALTER TABLE `poems` DROP COLUMN `po_illustrations`;
ALTER TABLE `poems` DROP COLUMN `po_illustrator`;
ALTER TABLE `poems` DROP COLUMN `po_links`;
ALTER TABLE `poems` DROP COLUMN `po_imageNotes`;

DROP TABLE `poem_search`;

120 minutes.