Chaucer's meter depended on the pronunciation of final "e"'s that even by his time were probably silent. It was soon forgotten that they were ever pronounced, so later readers could not recognize his meter and found his lines rough. His Scottish followers of the century from 1420 to 1520—King James I, Robert Henryson, William Dunbar, and Gavin Douglas—seem to have understood his meter (though final "e" had long been silent in Scots) and came close to it. Dunbar, in particular, wrote poems in true iambic pentameter.