Sir William Temple (1720). “The Works of Sir William Temple, Bart. ...: Observations upon the United Provinces of the Netherlands. Miscellanea. Memoirs. The third part. From the peace concluded 1679, to the time of the author's retirement from publick business. Memoirs ... from ... 1672, to 1679”, p.311
"'I envisioned my child pushing through a very heavy door… so I couldn't think about my own pain': Beyoncé opens up about giving birth and her plans for baby No.2" by Fehintola Betiku, www.dailymail.co.uk. February 11, 2013.