void BigPointerBlock::SetBigPointerArray()
{
    ArrayIndex StartingOffset;
    ArrayIndex Length;
    char *StartingLocation;
    ArrayIndex ElementCount;

    StartingOffset = m_ItemIndex[1].m_Offset;
    StartingLocation = m_Block->m_Data + BlockSize - StartingOffset;
    Length = StartingOffset - m_ItemIndex[0].m_Offset;
    ElementCount = Length/sizeof(QuantumNumber);
    m_BigPointerArray = BigPointerArray(ElementCount,
        (QuantumNumber *)StartingLocation);
}