  We study the examples mentioned in [2,Tables A & C] and establish the
arithmeticity of four examples of symplectic hypergeometric groups of degree
six. Following [2] we know that there are 458 inequivalent symplectic
hypergeometric groups of degree six, and combining the results of this article
with the work of [1,2,11], we now know that at least 384 are arithmetic and at
least 63 are thin whereas the arithmeticity and thinness of remaining 11
examples are still unknown.
