Proof of publication of said notices by affidavit of the publishers shall be filed with the clerk, and upon the expiration of ninety (90) days from the date of the first publication of said notice the default of all creditors which have not filed their dissent as above provided, and which have not filed their written assent or approval of said plan with the secretary, shall be entered as in other cases, and thereupon the court or the judge thereof, at chambers, shall fix a time for hearing said cause, and notice of such hearing shall be given to the dissenting creditors by mailing such notice to the address given by them, respectively, in their objections filed as aforesaid, or such notice may be given to their attorneys of record, at least twenty (20) days before the hearing.