Panizzi’s work at the British Library, especially on the foundations of cataloguing, had a long-lasting international influence. Foscolo, already in political exile, helped him re-establish himself. Thackeray, Macaulay and de Morgan were influential friends, Babbage a correspondent, while Roget clashed with him (Carlyle had an extended feud with him, but little direct contact). Mérimée had a wonderfully convivial friendship and correspondence with Panizzi, staying with him several times, and applying his ideas to the Bibliothèque National in Paris. Libri followed him into exile, bringing thousands of books he’d stolen.
Nodier brought many of the major French literary Romanticists together in a climate of ideas and influence. Hugo, Vigny, Dumas, Lamartine, Sainte-Beuve and Musset were all core members of his salon, the Salon de l’Arsenal or Cénacle. Both Dumas (a chance meeting in a theatre) and Hugo (who eventually wrested leadership from Nodier) had been befriended before. More occasional or latter-day members (some attracted as much by Nodier’s daughter’s looks) included Balzac, Nerval, Gautier, Mérimée (Nodier’s biographer), Delacroix and Liszt. Nodier met Scott, whom he admired, on a visit to Scotland in 1821.