§ 69. Opposing creditor to file specifications, and may demand jury trial. In order to entitle a creditor to oppose the discharge of the insolvent, he must, on the day fixed to show cause, or at such other time as the court may direct, file with the clerk a specification of his objections; and he may then, but not afterwards, demand a trial, by a jury, of the questions of fact arising thereupon. If a trial by a jury is not then demanded, the questions of fact must be tried by the court, without a jury. Where one of two or more opposing creditors demands a trial by a jury, all the material questions of fact, arising upon the objections of all the creditors, must be tried in like manner, and at the same time.