What does algate or algates mean?
The definition of algate and algates
Al”gate, Al”gates, adv.
Etym: [All + gate way. The s is an adverbial ending. See Gate.]

1 Always; wholly; everywhere. [Obs.] Ulna now he algates must forego. Spenser.

Note: Still used in the north of England in the sense of “everywhere.”

2 By any or means; at all events. [Obs.] Fairfax.
3 Notwithstanding; yet. [Obs.] Chaucer.