Series is divided into three subseries: Correspondence; Financial records; and Manuscripts, biographical information, and other textual materials. Records include textual records such as business and personal correspondence (including fan mail); financial records and receipts; drafts of writing related to birds and Lansdowne's personal history; and other ephemera.

Series is divided into two sub-series: Magazines featuring Lansdowne’s artwork and Newspaper and magazine clippings. Records include copies of magazines in which Lansdowne’s artwork is featured, along with newspaper and magazine clippings featuring articles about Lansdowne’s life and career. Also included are a small number of photographs.

Series contains Lansdowne’s personal photographs including pictures of family and friends, as well as pictures of him at work, and publicity photographs taken of him. Series also includes some photographs of birds, both live and taxidermic, which Lansdowne may have used as studies for his artwork. Series includes negatives, prints, slides, contact sheets along with a small number of envelopes, letters and notes.

Series consists of three subseries: Unfinished artwork, drawings, and sketches; Reproductions and prints; and Art inventory files. Records contain original artwork by Lansdowne (most of it unfinished paintings and sketches) as well as a few pieces by amateur artists who were fans of Lansdowne's work and reproductions of Lansdowne’s artwork which include prints, posters, banners, exhibit catalogues and cards, order forms, stamps, road maps, calendars and the like. Records also include Art inventory files which contain records on pieces of art that Lansdowne produced, including an art inventory card index, and files varying in contents, but which typically included at least one reproduction of the artwork, an envelope containing an alpha-numeric code and the name of the bird(s) featured in each piece. Art inventory files may also include photographs, negatives, positives, slides, and photocopies and the like.