1854 -- Gerald Massey -- Poems and Ballads (page 82)
They were three Spirits fresh from God's own hand,
And beautifuller ne'er took mortal mould.
1885 -- Walter Geikie --- Etchings illustrative of Scottish character and scenery. Sir T.D. Lauder's (page 54)
I've travell'd the world all over.
And many a place beside.
And I never did see a beautifuller city.
Than that on the banks of the navigatable river, the Clyde.
Origin of beautifuller
- beautiful + -er