Gibbons wrote a lot of keyboard works , around thirty fantasias for viols , some madrigals ( the best-known being The Silver Swan ) , and many popular anthems .
One of the most versatile English composers of his time , Gibbons wrote a quantity of keyboard works , around thirty fantasias for viols , a number of madrigals ( the best-known being `` The Silver Swan '' ) , and many popular verse anthems .