Definition of "pensill"

Fifthly, being thus on land with your compasse, set all lands or islands in sight, draw the form with your paper and pensill, and estimate their distance.

1631, Luke Fox, Narratives of Voyages Towards the North-West‎, published 2001, instructions to Iohn Coatesworth, page 168

[…] forty trumpet banners of sarsenet; seven hundred and forty pensills; three hundred and fifty pensills of tarter; four standards of sarsenet with boars; […]

1483, Richard III, “Richard III. to Piers Courteis, Keeper of his Wardrobe”, in Letters of the Kings of England‎, published 1846, page 153

However the account of the Pensill or hanging gardens of Babylon [...] is of no slender antiquity [...].

1658, Sir Thomas Browne, The Garden of Cyrus, Folio Society, published 2007, page 165