3 And all in deadly sleep did drowned lie,

deadly > death-like

4 One knocked at the door, and in would fare; 5 He knocked fast, and often cursed, and swore, 6 That ready entrance was not at his call: 7 For on his back a heavy load he bore 8 Of nightly stealths and pillage several,

stealths > stealing, thefts several > [of various kinds and from various places]

9 Which he had got abroad by purchase criminal.

purchase criminal > theft (purchase = acquisition)

103.17

He was to weete a stout and sturdie thiefe,
2 Wont to robbe Churches of their ornaments,
And poore mens boxes of their due reliefe,
4 Which giuen was to them for good intents;
The holy Saints of their rich vestiments
6 He did disrobe, when all men carelesse slept,
And spoild the Priests of their habiliments,
8 Whiles none the holy things in safety kept;
Then he by cunning sleights in at the window crept.

1 He was, to wit, a stout and sturdy thief,

stout > bold sturdy > courageous, ruthless