He only felt himself neglected, insulted, outraged: Questa e la data fede?
Son questi i miei bramati alti ritorni ?[46] Then he burst out into angry words, which he afterwards acknowledged to have been 'false, mad and rash.'[47] The duke's patience had reached its utmost limit.

Tasso was arrested, and confined in the hospital for mad folk at S.Anna.This happened in March 1579.

He was detained there until July 19, 1586, a period of seven years and four months.
[Footnote 46: From the sonnet, _Sposa regal_ (_Opere_ vol.iii.

p.
218).] [Footnote 47: _Lettere_, vol.ii.p.

67.] No one who has read the foregoing pages will wonder why Tasso was imprisoned.