ward > guard ("watch and ward" was formerly a common compound sb.)
3 For fear lest Force or Fraud should unawares 4 Break in, and spoil the treasure there in guard:
spoil > plunder, rob in > [under]
5 Nor would he suffer Sleep once thitherward
suffer > allow thitherward > towards there, in that direction
6 Approach, albe his drowsy den was next;
albe > although next > next adjoining (207.24:7), adjacent
7 For next to death is Sleep to be compared:
next > [most closely; cf. Aen. 6.278]
8 Therefore his house is to his annexed; 9 Here Sleep, there Richesse, and hell-gate them both betwixt.