Series I. primarily contains photographs, and family writings, as well as images of artistic renderings by the father of Hubert Rubentstein: J. Harry Rubenstein. A photograph of J. Harry Rubenstein as a boy includes a very young Harold Arlen (later a composer) at the Pine Street Shul, Buffalo, NY. This material was originally found in one bag of the original deposit. This bulk of this collection illustrates genealogical process at a particular moment in time when Jewish genealogy was gaining traction as a significant pursuit by increasingly professionalized “amateur” genealogists who were utilizing primary sources, creating resources, (some of which were newly opened in Eastern Europe) and making these available to a wide audience. These formed the basis of early computerized records of materials, which were carried out by volunteers in “special interest groups” also known as SIGS such as the one that Dr. Hubert Rubenstein worked with (Suwalk-Lomza – Poland). Series II is a window into this period of systematic genealogical endeavor in the mid-late 1980s and early 1990s. This series consists of letters and family tree printouts as well as journal materials. The letters were found loose in a box with family trees printouts usually separated from the letter. Letters was re-ordered in date with their enclosures where present. Separated printouts were kept separate. Correspondence and printout series were organized in date order to reflect the process Dr. Hubert J Rubenstein employed to build his family tree. Exceptions to this rule relate to continued correspondence with the same correspondent, where developing relationships are retained together within the same folder. Correspondence includes individuals in Canada, South Africa, Israel, England, UK, Latvia, Lithuania and Russia. It also includes professional genealogists (Miriam Weiner and Gary Mokotoff), genealogical societies, archives (international and US) and US government departments. As research materials, and group sheets, were separated from correspondence by the creator himself, this order has been maintained. As a result, researchers should check multiple subseries. Although there appears to be multiple copies of some family trees, they are often revised pages from these trees, not duplicates. Two types of printouts exist: Printouts produced by Hubert J. Rubenstein, and printouts he received.