How do I Close Inventory and return to previous Passage?

I've been following this tutorial on how to make an inventory system: http://gersande.com/designing-inventories-in-twine-2-with-the-built-in-harlowe-macros/#1

It's been really helpful so far, until I ran into their comment about using (history:)'s last. I don't want to use it because this is going to be a long game that may or may not have an option to view the inventory from a lot of different passages.

I want to have later passages that only happen if you have a certain item in your inventory.

How would I go about doing this in Harlowe?