The existence of an apparent sign of easement between two estates, established or maintained by the owner of both, shall be considered, should either of them be alienated, as a title in order that the easement may continue actively and passively, unless, at the time the ownership of the two estates is divided, the contrary should be provided in the title of conveyance of either of them, or the sign aforesaid should be removed before the execution of the deed. This provision shall also apply in case of the division of a thing owned in common by two or more persons. (541a)