3 adjectives to describe wellsprings

It has been well said, that a complete gallery, on a broad foundation, in which all tastes, styles, and methods harmoniously mingle, is a court of final appeal of one phase of civilization against another, from an examination of which we can sum up their respective qualities and merits, drawing therefrom for our own edification as from a perpetual wellspring of inspiration and knowledge.

She could repeat more verse than any other one of his acquaintances, though he laments that she was more familiar with modern poets than with the "pure wellsprings of English poesy.

So those loves are most fatal, most absorbing, in which, with unheeded quietness, every thought and fibre of our life twines gradually around some human soul, to us the unsuspected wellspring of our being.

3 adjectives to describe  wellsprings