Mary Astell convinced Montagu to publish her letters, which later became known as "Embassy Letters". Montagu did not intend to publish her poetry, but it did circulate widely, in manuscript, among members of her own social circle. Lady Mary was highly suspicious of any idealizing literary language. She wrote most often in heroic couplets, a serious poetic form to employ, and, according to Susan Staves, "excelled at answer poems". Some of her widely anthologized poems include "Constantinople" and "Epistle from Mrs. Yonge to her Husband". "Constantinople", written in January 1718, is a beautiful poem in heroic couplets describing Britain and Turkey through human history, and representing the states of mind "of knaves, coxcombs, the mob, and party zealous—all characteristic of the London of her time". "Epistle from Mrs. Yonge to her Husband", written in 1724, stages a letter from Mrs. Yonge to her libertine husband and exposes the social double standard which led to the shaming and distress of Mrs. Yonge after her divorce.