Thanks Sue, useful
So far I found that coastal trade was probably by sailing lighter and the first steam on coastal business in Scotland started one year before in 1856 centred on the Clyde - which is the other side... Glasgow etc. not the Forth (Edinburgh). That makes a steam vessel unlikely. From your link Sue I found that identifying a sailing ship is difficult as names were not controlled
1. Name of vessel;
FAME :chky:
2. Rig;
UNKNOWN :spls:
3. Name of master;
Only have The Captain :hb2:
4. Place, either of registry, departure, call, or arrival; and
Georgetown or Leith. :cheers:
5. A date, as precise as possible.
On or before 24th December 1957 :pty:
3 out of 5 is good.
What is interesting in this trail is finding the capacity of the Fame, as it stated in the letters
...our consumption of your small coal is one cargo a week
Pamela,

that is obscure! Also clearly a problem to translate as is Plattdeutsch derived and Carmen is a Bavarian. (My, from Flensburg, mother spoke Plattdeutsch but that is not much help.)