CREATE TABLE table_28938 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Name the district for matthew clay
SELECT "District" FROM table_28938 WHERE "Incumbent" = 'Matthew Clay'
SELECT "District" FROM "table_28938" WHERE "Incumbent" = 'Matthew Clay'