This subseries contains correspondence of Henry Daland Chandler with non-family members including friends, classmates, and colleagues. Included are letters from his classmates at Groton School and Harvard College, alumni, friends, and extended family. Subjects include academic affairs, wedding announcements, and club activities. The subseries also contains correspondence from members of the military during World War I (1914-1918), including General William Crozier. Other notable correspondents include Helen Peabody, Pauline D. Whiton, and Isabella Stewart Gardner.

For Henry Daland Chandler's correspondence with family members, see Series II.

This subseries consists of Henry Daland Chandler's personal diaries, sketchbooks, architectural notebooks, and travel graphics. The 1896 diary contains a few pages in Jan. and Feb. listing daily activities in Boston. The 1914 memorandum book contains lists, addresses, notes, and other small architectural drawings. The 1945-1947 diary contains three pages of entries.

The subseries contains two undated sketches, an undated sketchbook containing drawings of sailboats, and a 1938 sketchbook largely containing architectural sketches. The 1939 sketchbook contains a drawing of penguins and other subjects in Bermuda visited while on vacation. The architecture notebooks contain photographs, architectural sketches, notes, and calculations.

A set of commercial travel photographs include images of Rome, Italy, including St. Peter's Basilica, the Coliseum, the Temple of Vesta, the Tomb of Cecilia Metella, and other famous architectural sites. These images also include architecture on the island of Capri, Italy.

This series contains personal letters of the Chandler family relating to life in Boston; North Haven, Maine; and various travels in Europe. The bulk of the letters are from Alice Daland Chandler (1854-1932) to her husband Francis Ward Chandler (1844-1926), son Henry Daland Chandler (1884-1969) to parents during his schooling, and daughter Helen (Chandler) Winlock (1886-1972) to parents during travels in Cairo, Egypt. Within this series are receipts of service and sales for the family home on 195 Marlborough Street in Boston from 1883-1892. Early correspondence discusses daily life, children, education, and travels, including a trip to Lake Como, Florence, and Naples (1894-1895); Virginia Beach (1897); Washington, D.C. (1890); England, France, and Germany (1904); and Ormond Beach, Florida (1915). Other travels in regular visits to Intervale, N.H. and the Chandler summer homes in North Haven, Maine.

Early letters detail Henry's experiences at the Groton School in Groton, Mass. until graduation in 1902. An 1899 letter from Groton School describes Henry Daland Chandler's condition after catching mumps from a fellow classmate. Most of these letters describe Henry Daland Chandler's academic and extracurricular activites at Groton. Report cards also document Helen's education at St. Timothy's in Catonsville, Maryland in 1904.

Of particular significance are letters from Helen (Chandler) Winlock and her husband, archaeologist Herbert Eustis Winlock, to family members from 1912 to 1913 regarding Herbert's work in excavating the Deir el Bahari Temple Complex in Luxor, Egypt. Included is Helen's 24 Nov. 1912 letter to her mother from Highclere Castle in Newbury, England, describing the castle and the Egyptian collections of Lord Carnarvon. The letters discuss life in Luxor, the early archaeological camps of the Metropolitan Museum's expedition, and visitors to the site, including Rudyard Kipling in March 1813. Also within this series are letters from various non-family members to Alice Daland Chandler congratulating Ethel (Chandler) Bartol on her engagement in November 1913 to Dr. Edward Francis Washburn Bartol of Lancaster, Mass.

This series consists of Alice Daland Chandler's account books and diaries, Francis W. Chandler's diaries and memoranda books, and miscellaneous volumes. The miscellaneous volumes contain diaries, account books, and undated material of extended family.