the world > space > direction > [adverb] > to or towards some thing or place > to or towards that place or direction > onto that or which (4)
Of motion or direction to or towards (on, prep. 18 19a 20): On to which.
Of motion or direction: On or upon that or it; on to that.
= thereon, adv. 2: cf. in, prep. 36. Obsolete.
To that place, thing, affair, etc. in various senses of to, prep.