The liberty which some rude jester has taken with Dr. Marshall, of Durham, in putting in a claim for him to the Ballad on Sir John Moore, has led many to suppose, that the Doctor has no better claim to the title of poet than he has to the above verse. We confess we were of the number who did this injustice to the Doctor. A friend, however, has transmitted to a contemporary the following lines, which appeared in the Durham Chronicle, of Dec. 8, 1821, which not merely proved that the Doctor is a poet, but warrant us in pronouncing, that one of the greatest poets of this country treads in his footsteps.