BiographyIsaak, William (William, Issak); b. 1904, Switzerland; Swiss citizen living in US; Married; Domicile Milwaukee, Wisconsin; Arrived in Spain on April 5, 1937, Served with the XV BDE, Mackenzie-Papineau BN, MG Co.; Deserted, apprehended April 29, 193; Refused to work or go back to the front; sent to Castillo de Fells, in May 1938 was in Badalona.
Source: Scope of Soviet Activity; RGASPI Fond 545, Opis 6, Delo 553 (name only); Opis 6, Delo 915, ll. 15-17; Opis 6, Delo 1477; Opis 6, Delo 1502; Swiss entry under Isaac William. (http://www.spanienfreiwillige.ch/handbuch.html#h).