ADU v KYEREME Mortgages—Building sale—Loan transaction evidenced by mortgage deed—Defendant offering house as security—Defendant obliged to make possible mortgage’s exercise of power of sale—House sold to plaintiff upon defendant's default in payment—Defendant pleading invalidity of mortgage deed for lack of consents as mandatorily required by statutes—Duty of defendant as mortgagor in such circumstances—Whether defendant can plead absence of such concurrences to annul his own mortgage transaction—Local Government Ordinance, Cap 64 (1951 Rev.), s. 75 (1)—State Councils (Ashanti) Ordinance, 1952 (No. 4 of 1952), s. 24 (1).