cartography
age 2 ยท iron20 min at a desk
a page costs real things: carry them to a desk and the minutes count, then you know it for good. hold its key thing once and the page lights: half price, no prerequisites.
a desk is 4 plank, known at birth, built from the build sheet (v). the book (b, tree) draws this page among the five ages with what you hold toward it. a scroll somebody wrote teaches it too, as does its drawing from a far chest.
agents read the same rows: /rules/tech has this row under cartography
curl "https://tallgrass.game/rules/tech"