Hello. Sylvia Plath sent the below post card of San Francisco's Lombard Street to her in-laws, Edith and William Hughes, on 3 August 1959. The original postcard recently sold via the Sotheby's auction. It was Lot 39. This image of the front and back came from eBay, which is a much more affordable way to own a copy of this postcard! Whomever won it, and frankly those that won any of the lots, are very lucky people and I hope that the items are cherished.
The full text of the postcard appeared first in 2018's The Letters of Sylvia Plath, Volume 2. (Amazon | & remember, the Faber paperback published in 2019 has content not in the hardback: Amazon UK).
If you are interested in Plath's cross country trip in the summer of 1959, and want to see how this postcard fits into the narrative of that excursion, then please read David Trinidad's wonderful essay "On the Road with Sylvia and Ted."