I have had a return call from my friend. They have checked, and they know that the transcription index I used was made in Excel, and perhaps CF instead of TL is simply a data entry error. BUT they also mentioned something for you to consider:
If you look at the images uploaded to Ancestry for the Ticket of Leave Butts, perhaps you could look at the ones just before and just after your William ARMSTRONG’s one.
Look for the letter reference 45/10446 and the mention of Surveyor and notice that DARKE, Surveyor and also another Surveyor are mentioned, and that the Administrative officers must have been very busy on 19 November 1845….
45/2051 starts the sequence on 19 November (image 117 of 904)
45/2111 mentions Dark, (180/904) Yass bench
45/2112 , Darke, Surveyor (181/904) Queanbeyan bench
45/2113, Darke Surveyor 182, Wollongong Bench
45/2114, a different Surveyor but letter 45/10446 reference, Yass bench
And so on including YOUR chap, and after him too ….
45/3229, Darke, As. Surv’r (Assistant Surveyor) 188/904, Berrima Bench
45/2120, Darke Surveyor, …… 189/904, on recommendation of Windsor Bench
45/2121, Darke, 190/904, Berrima bench
I think last one in that sequence is : 45/2127, 19 November, Darke, 196/904, Campbelltown Bench,
So, perhaps ‘Windsor’ is simply an ADMINISTRATIVE ERROR at H.Q., processing a bulk issue of Tickets of leave in the post penal era, (when admin staff were being stood down, or re-assigned away from convict admin) rather than any actual active intervention by Morrisset or Darke or even Armstrong. All that paperwork that needed to be handwritten onto forms, using quill and real ink.
And, they also mentioned that Cecilia could not possibly be the actual daughter of William, but he may well have been the father figure in her life.
JM