that > [so that]
3 Till him the child bespoke: "Long lacked, alas,
child > youth of gentle birth (also used as a title, as in "Childe Harold") bespoke > addressed
4 Has been your faithful aid in hard assay,
assay > endeavour; trial, trial by affliction
5 While deadly fit your pupil does dismay;
dismay > overcome
6 Behold this heavy sight, you reverend sire,
heavy > sad sire > {Father; form of address to an elderly or holy man; the original form of "sir"}
7 But dread of death and dolour do away; 8 For life ere long shall to her home retire,