On 20 Jul 1639, some sources say 11 Jul 1639, Henry Spencer 1st Earl of Sunderland (age 18) and Dorothy Sidney Countess Sunderland (age 21) were married at Penhurst Rother. She by marriage Baroness Spencer Wormleighton. Her long-term suitor, she was the 'Sacharissa' of his poems, Edmund Waller (age 33) wrote a letter to the bride's sister (age 12) on the occasion of the wedding. She the daughter of Robert Sidney 2nd Earl of Leicester (age 43) and Dorothy Percy Countess Leicester (age 41).

Madam,

In this common joy at Penshurst, I know none to whom complaints may come less unseasonably than to your ladyship, the loss of a bedfellow being almost equal to that of a mistress; and therefore you ought at least to pardon, if you consent not to the imprecations of, the deserted, which just Heaven no doubt will hear. May my lady Dorothy (age 21), if we may yet call her so, suffer as much, and have the like passion for this young lord, whom she has preferred to the rest of mankind, as others have had for her; and may his love, before the year go about, make her taste of the first curse imposed upon womankind, the pains of becoming a mother. May her first born be none of her own sex, nor so like her but that he may resemble her lord as much as herself. May she that always affected silence and retirement have the house filled with the noise and number of her children, and hereafter of her grandchildren; and then may she arrive at that great curse, so much declined by fair ladies, old age; may she live to be very old and yet seem young; be told so by her glass, and have no aches to inform her of the truth; and when she shall appear to be mortal, may her lord not mourn for her, but go hand in hand with her to that place where we are told there is neither marrying nor giving in marriage, that being there divorced we may all have an equal interest in her again! My revenge being immortal, I wish all this may befall her posterity to the world's end and afterwards! To you, madam (age 12), I wish all good things, and that this loss may in good time be happily supplied with a more constant bedfellow of the other sex. Madam, I humbly kiss your hands, and beg pardon for this trouble, from

Your ladyship's

most humble servant,

E. Waller.