Definition of "highth"

Amidſt thir highth of noon,

1671, John Milton, “Samson Agonistes, […].”, in Paradise Regain’d. A Poem. In IV Books. To which is Added, Samson Agonistes, London: […] J. M[acock] for John Starkey […], page 45, line 684

Neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come, nor highth, nor depth, nor any other creature, shall he able to separate us from the love of God, which is in Christ Jesus our Lord.

1840, Julius Charles Hare, The Victory of Faith, and Other Sermons‎, Digitized edition, published 2006, page 178