What number was manufactured 1 in 1841?
CREATE TABLE "locomotives_of_the_early_period_for_all_" (
  "class" text,
  "number_s" text,
  "quantity" text,
  "year_s_of_manufacture" text,
  "type" text
);
SELECT "number_s" FROM "locomotives_of_the_early_period_for_all_" WHERE "quantity"='1' AND "year_s_of_manufacture"='1841';