I don't have reliable information about a specific work titled "The Sickly Cryptogam" by Charles Meryon in my training data. While Meryon (1821 1868) was a renowned French etcher known for his detailed urban landscapes and imaginative compositions, I cannot verify this particular title or provide accurate details about this work without risking fabrication. I would recommend consulting museum collections, catalogues raisonnés of Meryon's work, or specialized print databases for factual information about this piece.