English scientist and astronomer (1836–1920) credited with Pierre Janssen as the co-discoverer of helium. Uncommon ALS, one page, 4.5 x 5.75, Solar Physics Observatory letterhead, November 21, no year. Response to an invitation, in full: “It will give me great pleasure to dine with you on Dec. 4.” In fine condition, with a few small stains affecting nothing. Pre-certified PSA/DNA.
This item is Pre-Certified by PSA/DNA
Buy a third-party letter of authenticity for
$35.00
*This item has been pre-certified by a trusted third-party authentication service, and by placing a bid on this item, you agree to accept the opinion of this authentication service. If you wish to have an opinion rendered by a different authenticator of your choosing, you must do so prior to your placing of any bid. RR Auction is not responsible for differing opinions submitted 30 days after the date of the sale.
