Just to wrap up this thread:

Doing:

select  _db_cluster.setdroptable_int(121);

Produces the error:

ERROR:  Slony-I: alterTableRestore(): Table with id 121 not found

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I think I've screwed things somewhere along the line with my tinkering and
will rather acknowledge the lesson well learned -- and as David suggested
from the start, drop replication from the nodes, and restart from scratch.
 Things will only get worse from here on out, wasting everyone's time.

Thank you to everyone who assisted.

Regards
Henry