RELATIVAL CONSTRUCTIONS. As, a conjunctional affix
As is used in the same way as a conjunctional affix. Thus "while as:" “Pirates . . . still revelling like lords till all be goneWhile as the silly owner of the goods
Weeps over them.” 2 Hen VI. i. 1. 225. "When as:" “When as the enemy hath been ten to one.” 3 Hen VI. i. 2. 75. “When as the noble Duke of York was slain.” Ib. ii. 1. 46. So Ib. v. 7. 34. "Where as" is used by us metaphorically. But Shakespeare has “Unto St. Alban's,
Where as the king and queen do mean to hawk.” 2 Hen VI. i. 2. 57. “They back retourned to the princely Place,
Whereas an errant knight . . . they new arrived find.” SPENS. F. Q. i. 4. 38. So "there as" is used in earlier English. "There that" is also found in Chaucer in a local sense. Of course the "so" in "whenso," "whereso" &c., is nearly the same in meaning, just as it is the same in derivation, with the as in "whenas," &c.