CREATE TABLE table_58359 ("Institution" TEXT, "Location" TEXT, "Founded" FLOAT, "Type" TEXT, "Enrollment" FLOAT, "Nickname" TEXT, "Joined" FLOAT, "Left" FLOAT, "Current Conference" TEXT)

Where was the former private member that was founded in 1891 and left in 1975?
SELECT "Location" FROM table_58359 WHERE "Left" = '1975' AND "Type" = 'private' AND "Founded" = '1891'
SELECT "Location" FROM "table_58359" WHERE "Founded" = '1891' AND "Left" = '1975' AND "Type" = 'private'