Among the buzziest booths at this year’s Armory Show is that of Sean Kelly, which features work by the likes of Marina Abramović, James Casebere, Alec Soth, and Kehinde Wiley. The New York gallery is also spotlighting three recent additions to its stable of artists: Idris Khan, Nathan Mabry, and Peter Liversidge (on Tuesday, Sean Kelly announced its representation of Terence Koh). Just around the corner from Khan’s mini-museum of clouds trapped in lucite is “Wooden Mail Objects” (2011), a shelf of rulers, protractors, and chalkboard erasers that London-based Liversidge mailed to Kelly, sans envelopes, over the course of three months. Beside the stamp-covered objects is the artist’s deadpan installation proposal, written on his trusty manual typewriter. Liversidge is also represented by what he describes as a text piece: a hand-held embosser placed on a white podium. It, too, is accompanied by a framed noticed. “Whoever reads this proposal is invited to take a one-dollar note from their pocket, wallet, or purse. In their other hand they should take up the embosser and place the note within it’s [sic] jaws,” he explains. “Then apply pressure and emboss the note with the text piece concealed within.” Pull out your dollar to reveal the imprint of a single word: free. No word as to how much this work sold for.