UNCLE TOM'S CABIN.—The question has been asked "would it be improper for Clergymen and Church members to visit the 'National Theatre,' during the performance of this piece"—our answer would be as no other Theatrical representation is given with it, there would be no impropriety in the religious portion of our community witnessing it. It is a moral, religious and instructive illustration of the justly celebrated work of Mrs. Harriet Beecher Stowe, and is most faithfully dramatised. The Representation of Little Eva, by Little Cordelia Howard, should be witnessed by every Lady in the land. We are informed, that the Manager has taken every precaution that no disorderly person be admitted to the Theatre during the performance of this great production.