Mortgage when to be by assurance.-
Where the principal money secured is one hundred
rupees or upwards, a mortgage other than a mortgage
by deposit of title deeds can be effected only
by a registered instrument signed by the mortgagor
and attested by at least two witnesses.
Where the principal money
secured is less than one hundred rupees, a mortgage
may be effected either by a registered instrument
signed and attested as aforesaid or (except
in the case of a simple mortgage) by delivery
of the property.