CREATE TABLE table_61564 ("Election" FLOAT, "1st Member" TEXT, "1st Party" TEXT, "2nd Member" TEXT, "2nd Party" TEXT)

Which 1st party has 2nd party conservative, election smaller than 1852, and Thomas Grimsditch as 2nd member?
SELECT "1st Party" FROM table_61564 WHERE "2nd Party" = 'conservative' AND "Election" < '1852' AND "2nd Member" = 'thomas grimsditch'
SELECT "1st Party" FROM "table_61564" WHERE "2nd Member" = 'thomas grimsditch' AND "2nd Party" = 'conservative' AND "Election" < '1852'