He was the victim of a celebrated fraud paying the equivalent of 20,000 pounds for various letters from famous men of science and others which turned out to be forged. Chasles collected autographs and manuscripts but appears to have displayed a naiveté which is almost unbelievable.
Siya ay ang biktima ng isang bantog pandaraya sa pagbabayad ang katumbas ng 20,000 pounds para sa iba't-ibang mga titik mula sa bantog na lalaki ng agham at iba na nabuksan out na imitasyon. Chasles nakolekta autographs at manuscripts ngunit lilitaw na may ipinapakita ng kawalang-malay na kung saan ay halos mahirap na paniwalaan.