What would "SM" be an abbreviation for, in passenger list records?

Question

I've taken the following screenshot of part of my maternal 2nd great-grandfather's older brother's [Scadden-57] entry in the Forfarshire passenger list, which departed London, England 16 November 1872 for Wellington, New Zealand, arriving 2 March 1873. I think the letters are "S M". (Please correct me if I'm wrong.) Can anyone tell me what they stand for?

The full entry reads (text in brackets added by me to provide clarity):
Barnett, G. 13 [under Age, Adults, Male] transferred to S. M [to explain why 13 is crossed out, perhaps?] Errand Boy [under Occupation]

Click here for the image details page or here for the full-sized version (1075 x 75).

Comments

I think it simply means he was transferred from the family group to the "single males" list of passengers.

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That makes sense. Thank you!

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I wish I could see the entire passenger list to be sure, but it does seem to follow how I have found family members on the same types of lists going to Australia.

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Actually, I did a scroll-through on FamilySearch, and found him re-listed under Single Males.  See https://www.familysearch.org/ark:/61903/3:1:S3HT-DR86-S6 5th name down the list, so I'm more sure that the SM means as I said - transferred from family group to single males.

Answer 1

SM - single male