CREATE TABLE table_22642 ("HR no." TEXT, "HR name" TEXT, "CR no." FLOAT, "LMS no." FLOAT, "Built" TEXT, "Works" TEXT, "Withdrawn" TEXT)

When river ness is the hr name what is the hr number?
SELECT "HR no." FROM table_22642 WHERE "HR name" = 'River Ness'
SELECT "HR no." FROM "table_22642" WHERE "HR name" = 'River Ness'