There are currently 11 cards (517, 528, 532, 538, 541, 552, 556, 566, 570, 576, and 590) whose placements in the 1966 high series sheet are unknown. What is known is that 517 is in C11, that 532 is adjacent to 552, and that 576 (Nicholson) is above either a mgr or RC.
This miscut of card #556 shows that it is above a regular card, not a RC or Mgr. Sorry about poor quality, but it was the only one I found on Worthpoint. Since, Column 11 has 574, 549, 553, 539, (all RCs) and 517 (checklist) in it, it is unlikely, but not impossible for Queen (556) to be in C11.
1966_556_B.JPG