Like the "Indian Queen" (1857), there is no "official" record of
ALL immigrants who were aboard the "Kinnaird" to Wellington in 1859. [Although for the "Kinnaird" we have the passenger list info originally sourced from a newspaper report.]
These two vessels and a number of others, were part of an Immigration Scheme known as the "Black Ball Contract" (named I think, after the shipping line who transported the emigrants to Wellington). The scheme allowed for persons already resident in the Colony, to bring out to NZ, their relatives and friends.
There's an interesting article (from 1857) giving all the conditions etc. at ...
"Wellington Independent" - 16 February
1859 - page 1 / column 4
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But unlike the "Indian Queen", there is no particular list showing the
actual number of Promissory Notes held by each of the immigrants (or heads of family on behalf of others). So it's been a case of having to scour the (unindexed) "Cash Books" and "Outward Letters" and other "Correspondence" to glean a little more information.

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MASON - John and family - per "KINNAIRD" (1859) appeared in a cash book dated 1860 ... with the amount of "50 pounds 10s" alongside of his name (and a note that Wm. MASON had provided the surety). Only marginally helpful - but it did give a clue that that amount of passage money probably represented "a husband, wife, and two children under the age of 12".
Directly above that listing though was a
"Jno. LEIGHTON and family" (for the same amount) ... sponsored by "W.F. MASON" !!!
And John LEIGHTON (as I've now discovered), also has a MASON family connection.
see next >>