1858 San Francisco CA Dbl Rate Cover to Mass Perforated 10c Green Pair Steamship For Sale

Title: 1858 San Francisco, California to Andover, Massachusetts – Transcontinental Double-Rate Postal Cover Via Steamship John L. StephensHistorical Narrative & Postal History Context:
This historic transcontinental cover was mailed from San Francisco in January 1858 and sent via the Panama route to Miss Emma L. Horwell at the historic Abbott Female Seminary (Abbot Academy) in Andover, Massachusetts.The letter was carried down the Pacific coast by the legendary Pacific Mail Steamship Company paddle steamer, the John L. Stephens. Named after the famous American explorer, this vessel was one of the most prominent mail and passenger carriers of the California Gold Rush era.1. The Mid-Month Down bound Mail Run (Departed SF January 5, 1858)

• Departure: The John L. Stephens departed San Francisco on January 5, 1858, loaded with California mail bags and passengers bound for the East Coast.
• The Route: She steamed down the Pacific Coast, stopping briefly for coal and local mail at Acapulco, Mexico.
• Arrival at Panama: She arrived at the Port of Panama on approximately January 17–18, 1858.
• The Connection: The mail bags were immediately unloaded, transferred to the Panama Railroad,and hauled across the Isthmus to Aspinwall (now Colón). From there, an Atlantic sister ship (likely the Moses Taylor) loaded the mail and sailed to New York,where it was distributed to the rail lines heading north to Andover, Massachusetts.

Postal Rates & Philatelic Details:

• Postage Paid: 20 cents, representing a scarce transcontinental \"Double Rate\" (2 × 10¢ per 1/2 ounce for distances exceeding 3,000 miles) under the U.S. Postage Rate Act of 1855.
• Stamps: Features a slightly overlapped pair of 10-cent green George Washington perforated issues (Scott #32 or #33). Both stamps boast intact perforations and very strong, well-centered designs.
• Cancellations: Faint but legible black San Francisco, Cal. town cancel overlapping the stamps and envelope. \"San\", \"Cal\", \"Jan\", and the \"18\" of the year date are clearly discernible.
• Markings: The upper-left corner features contemporary era handwriting identifying the vessel: \"John L. Stephens\".
• Condition Report:
  • Front: Extremely clean presentation with excellent eye appeal. The stamp pair is beautifully positioned with clear margins and intact perforations.
  • Reverse: The cover is open and missing its back flap. The reverse features light, vintage pencil docketing from previous philatelic collections/dealers, reading: \"Type 3 double rates\", \"John L. Stephens Mail Steamship 1858\", \"536/c co+\", and \"#21\".