If those I loved were lost — Joanna the Mad

Joanna of Castile (1479-1555), married to Philip I of Castile (1478-1506) in 1496, was confined in a convent for over forty years by her husband and son Charles V. They said she was mad.

If those I loved were lost 1
The Crier's voice would tell me－
If those I loved were found
The bells of Ghent would ring－

Did those I loved repose 5
The Daisy would impel me.
Philip－when bewildered
Bore his riddle in!
(F.20/J.29)
[1] those, loved were lost:: the death of her brother and sister, which made her the heiress of Castilian.
[2] Crier:: an officer in a court who makes public announcements.
[3] those, loved were found:: her sons, Charles V (1500-1558) and Ferdinand I (1503-1564) became the rulers of the Holy Roman Emperor.
[4] bells of Ghent:: it would ring for major events. Crier and bells show that she was isolated from meeting. Ghent and Philip are key words that lead to Philip I of Castile.
[5] repose:: to leave the control to another.
[6] Daisy:: a first-rate person, her son Charles.
[7] Philip:: a hedge-sparrow (OED 3); Joanna's husband. bewildered:: lost direction.
[8] Bore, in:: a bird flew into her concealed chamber in Tordesillas, and she treated it as her husband who buried there also. She was nicknamed Joanna the Mad.

Joanna was the only surviving child of Ferdinand the Catholic, and the great Isabella of Castille. She married Philip, the handsome son of the Emperor Maximilian; and after a few years of married life, rendered very miserable by his neglect and her jealousy, at his death she became mad. His remains were interred in the Monastery of Santa Clara, adjoining the Palace at Tordesillas; and she sat at the windows that overlooked the sepulchre, mourning and keeping watch, for seven-and-forty years, never leaving the walls of her habitation, or taking any part in the government of her vast possessions, to which her son, the Emperor Charles V., succeeded. Music was her sole delight and recreation. ─ The Lament of Joanna of Spain, by Mrs. Acton Tindal, Shilling Magazine (1847)

Marriage of Philip, archduke of Austria, with Joanna the Mad, daughter and heiress of Ferdinand the Catholic. ─ Chronology for Schools (1858)