Struggling to get over the line on this. I have a completed grid apart from the central square; I have (i), (ii) and (iii) and have followed the instruction in the path. My deciphering of the related note starts with a long word, that's also separately visible in the grid, followed (ignoring cells already visited) by two more letters, the first of which is quite unpromising for the start of a word. Where my deciphering finishes does not leave me within 3 steps of the central square (if that is how I am supposed to complete a message). I am not sure I am reading the end of the related note correctly, given the two letters I am left with at the end; I can guess at two entries to highlight, but not certain why; and don't know what to put in the central square that will complete a message.
Any gentle nudges to help me on the right path would be appreciated!