An enclosed place
The means of enclosure
A writing instrument
Types of pens and pen points include: fountain, ink, common, desk, drawing, ruling, marker, artist's, calligraphic, reed, quill, steel, ball point, felt tip, roller ball, highlighter, biro (British); nib, stub, fine, coarse, Spencerian; Speedball, Sharpie, Osmiroid (all trademarks).
To be the author of (a published work or works):publish, write. See words verb
To confine within a limited area:cage, coop (in or up), enclose, fence (in), immure, mew (up), shut in, shut up, wall (in or up). See free noun (Informal)
A place for the confinement of persons in lawful detention:brig, house of correction, jail, keep, penitentiary, prison. (Informal) lockup. (Slang) big house, can, clink, cooler, coop, hoosegow, joint, jug, pokey1, slammer, stir2. (Chiefly Regional) calaboose. See free