“Pleasant, the heath when it is green;
Also pleasant, the salt marsh for cattle.
Pleasant, the time when calves draw milk;
Also pleasant, foamy horsemanship.”

Book of Taliesin (c. 1275?), The Pleasant Things of Taliesin

The Cynic's Calendar of Revised Wisdom (1905).

Source: Thebaid, Book V, Line 48 (tr. J. H. Mozley)

Early Diary kept at Fruitlands, 1843. https://www.gutenberg.org/files/38049/38049-h/38049-h.htm
Life, Letters, and Journals. (1898)

Virginibus Puerisque, Ch. 2.
Virginibus Puerisque and Other Papers (1881)
Context: Hope is the boy, a blind, headlong, pleasant fellow, good to chase swallows with the salt; Faith is the grave, experienced, yet smiling man. Hope lives on ignorance; open-eyed Faith is built upon a knowledge of our life, of the tyranny of circumstance and the frailty of human resolution. Hope looks for unqualified success; but Faith counts certainly on failure, and takes honourable defeat to be a form of victory. Hope is a kind old pagan; but Faith grew up in Christian days, and early learnt humility. In the one temper, a man is indignant that he cannot spring up in a clap to heights of elegance and virtue; in the other, out of a sense of his infirmities, he is filled with confidence because a year has come and gone, and he has still preserved some rags of honour. In the first, he expects an angel for a wife; in the last, he knows that she is like himself - erring, thoughtless, and untrue; but like himself also, filled with a struggling radiancy of better things, and adorned with ineffective qualities. You may safely go to school with hope; but ere you marry, should have learned the mingled lesson of the world: that dolls are stuffed with sawdust, and yet are excellent play-things; that hope and love address themselves to a perfection never realised, and yet, firmly held, become the salt and staff of life; that you yourself are compacted of infirmities, perfect, you might say, in imperfection, and yet you have a something in you lovable and worth preserving; and that, while the mass of mankind lies under this scurvy condemnation, you will scarce find one but, by some generous reading, will become to you a lesson, a model, and a noble spouse through life.

Source: Death Bringer

Source: The Unbearable Lightness of Being

Sydney J. Harris, as quoted in The Routledge Dictionary of Quotations (1989) by Robert Andrews; also quoted as: "...a pleasant place in which to spend one's leisure."
Misattributed

Mont Saint Michel and Chartres (1904)