My knowledge is wholly at your device.
But I never studied, to be precise,
Nigromancy in all its parts.
It is quite the hardest of all the arts,
And for a novice perilous as well.
Suppose there’s wanting in your spell
A word or letter wherewithal
Ye would make the spirit that ye call
Your wishes duly to obey,
The fiend would break your neck straightway.