Complex sentence: Several of those, most notably Henry Montague, came to the US and formed The Lambs of NY during Christmas week of 1874-it was later incorporated in 1877 in New York City, and shortly afterward, the London Lambs folded.
Split into simpler sentences: Several of those, most notably Henry Montague, came to the US and formed The Lambs of NY during Christmas week of 1874. It was later incorporated in 1877 in New York City, and shortly afterward, the London Lambs folded.