CREATE TABLE table_68468 ("Class" CLOB, "Type" CLOB, "Fleet numbers" CLOB, "Quantity made" FLOAT, "Manufacturer" CLOB, "Date made" FLOAT, "Date withdrawn" CLOB)

Which manufacturer made a locomotive with a type of 4-6-4t?
SELECT "Manufacturer" FROM table_68468 WHERE "Type" = '4-6-4t'
SELECT "Manufacturer" FROM "table_68468" WHERE "Type" = '4-6-4t'