Bless you, my darling, and remember you are always in the heart — oh tucked so close there is no chance of escape — of your sister.

The line reads as an intimate, affectionate assurance of enduring attachment, framed in the language of a private letter. Mansfield’s speaker blesses the addressee (“my darling”) and then intensifies the sentiment with a playful, almost possessive metaphor: the beloved is “tucked so close” in the sister’s heart that escape is impossible. The dash-driven syntax mimics spoken emotion—an outpouring that swells mid-sentence—suggesting urgency, tenderness, and a desire to comfort across distance. The signature “of your sister” emphasizes familial devotion while also implying separation (physical or emotional) that the writer tries to overcome by insisting on an inescapable place in memory and love.