Beautiful letter from Pierre de Nolhac, after reading Popelin's sonnets, “magnificent series, unique, it seems to me, since the century of the Pléiade. All the pieces are interesting, whether they offer food for meditation or simply joy to the ear. Many have, alongside the beauty of a work of art, this great moral beauty that comes from the soul and from this noble ancient serenity, which seems to have been truly the “sun” of your life”. He quotes the poems which are his preference. "Several of them particularly appeal to me 'reborn' by their flavor of style, and these are not only your pastiches of the old language, but others, familiar or heroic, in which I find again, surprised and charmed, the sensation of the sonnet of Du Bellay and de Ronsard, a very French sensation that no contemporary gave me […]”. His verses encourage him “to unravel my lyre, buried for so long under Greek and Latin folios […]”.