opinion: PER CURIAM.
  Having regard to the peculiar facts and circumstances of this ease, the relations existing between the mortgagor and the mortgagee, especially that the contested mortgage for $5,225, assuming the same to have been given originally for a valid consideration and effective as between the parties, was by understanding, if not by agreement, withheld from the record, so as not to affect the mortgagor’s credit, the conclusion of the court is that the action of the District Judge and the referee, expunging and disallowing the said claim from the list of those upon the trustee’s record, should be approved and affirmed. We are led to this view, moreover, by the fact that the case seems to be ruled by those of National Bank of Athens v. Shackelford, 36 S. Ct. 17, 239 U. S. 81, 60 L. Ed. 158 (in the Circuit Court of Appeals, 208 F. 677, 678, 125 C. C. A. 575); In re Lamie Chemical Co. (C. C. A.) 296 F. 24, 28; Millikin v. Second National Bank, 206 F. 14, 19, 124 C. C. A. 148 (both decisions of this court).
  Affirmed.
instruction: What follows is an opinion from a United States Court of Appeals.
  Intervenors who participated as parties at the courts of appeals should be counted as either appellants or respondents when it can be determined whose position they supported. For example, if there were two plaintiffs who lost in district court, appealed, and were joined by four intervenors who also asked the court of appeals to reverse the district court, the number of appellants should be coded as six.
  When coding the detailed nature of participants, use your personal knowledge about the participants, if you are completely confident of the accuracy of your knowledge, even if the specific information is not in the opinion. For example, if "IBM" is listed as the appellant it could be classified as "clearly national or international in scope" even if the opinion did not indicate the scope of the business. 
  
  Your task concerns the first listed appellant. The nature of this litigant falls into the category "private business (including criminal enterprises)", specifically "financial institution". Your task is to determine what subcategory of business best describes this litigant.
choices: bank insurance savings and loan credit union other pension fund other financial institution or investment company unclear