Interval of grateful shade. P. Doddridge. [Evening.] In the "Doddridge Manuscript" this hymn is given in full, but without date. In 1755, it was included in Doddridge's (posthumous) Hymns, as the second of the "Hymns on Particular Occasions and in Uncommon Measures," being No. ccclxiii. of the volume, in 70 lines, and entitled "An Evening Hymn, to be used when composing oneself to sleep." It is also in J. D. Humphreys's edition of the Hymns, 1839, No. 309. In 1812, Dr. Collyer gave the complete hymn in his Collection, dividing the same, as in Doddridge's Hymns, into three parts, and using each part as a separate hymn. He also divided the unbroken lines of the original into stanzas. The three hymns thus made were:—
"Interval of grateful shade."
“What though downy [peaceful] slumbers flee."
“What if death my sleep invade."
This arrangement was repeated in Bickersteth's Christian Psalmody, 1833, Nos. 489, 490, 491, in Elliott's Psalms & Hymns, 1835, No. 827, and other collections. In this manner these three hymns were handed down to modern collections. A cento from the poem is also in common use. It begins: "Heavenly Father, gracious Name."
--John Julian, Dictionary of Hymnology (1907)