Two record cartons, arranged chronologically by organization, contain annual reports for the Boston Port Society, the Seamen's Aid Society, and the Boston Port and Seamen's Aid Society, formed in 1867 when the two groups merged. Annual reports for the Boston Port Society include the following years: 1832, 1836, 1844, 1849, 1851, 1853, and 1858. Seamen's Aid Society annual reports include the following years: 1836, 1838, 1843-1851, 1853, 1855, 1857, 1859, 1861, 1863, 1864, and 1866. Annual reports for the Boston Port and Seamen's Aid Society include 1870-1875, 1878-1889, 1892-1904, 1906, 1908-1915, 1917, 1919-1921, 1924-1940. The series also includes the Commonwealth of Massachusetts' "Act of Incorporation and By-Laws, Managers of the Boston Port and Seamen's Aid Society," 1935.

Annual reports include yearly reviews, treasurer's reports, lists of officers, members, and donors, acts of incorporation and by-laws, historical sketches of Mariner's House, biographies of Father Taylor, and lists of lectures, musical programs, and evening entertainments.

Five volumes of minutes contain records for annual meetings of the Boston Port and Seamen's Society and monthly meetings of the Board of Managers (or House Committee). Two volumes also include a few pieces of board correspondence. Annual meetings recorded attendance, approved treasurer's statements, and elected officers. Monthly meetings of the Board of Managers oversaw the operation of Mariner's House, took the report of the Committee for the Month, and authorized expenditures.

The Committee for the Month (or Visiting Committee) consisted of two people selected on a monthly basis to visit and inspect Mariner's House several times a month, approve its accounts at the end of the month, and report on the condition of the house. Committee for the Month records include visit reports, tallies of monthly lodgers and boarders, and monthly account statements. Visit reports mention the general state of Mariner's House, cleaning projects, purchases of new supplies, and other notable activities.

Boston Port and Seamen's Aid Society accounts include two volumes of treasurer's accounts and one volume of investment accounts. Treasurer's accounts include detailed listings of the Society's income, including interest, legacies, and expenditures such as salaries, expenses, and investments. Treasurer's accounts also include lists of shares held by Boston Port and Seamen's Society. The volume of investment accounts includes detailed listings of the Society's investments in many companies, as well as accounts for income, the general fund, and legacies. There is an index in the investment accounts volume.

One volume records rent collected from tenants in Boston Port and Seamen's Aid Society property at 319-323 Hanover St. The entries are organized by tenant, year, and month. The property is located directly behind Mariner's House and served as housing for Mariner's House employees, overflow space for Mariner's House, and affordable housing for retired sailors.

Registration records for Mariner's House include nine bound registers and registration cards. The registers are organized by date and record the name of each lodger, room, address, the name of the ship on which they arrived, departure date, destination, and the name of the ship on which they will depart, as well as charges, debts, and credits. Registration cards, kept from ca. 1959-1965, are organized alphabetically and record name, address, room number, ship names, telephone numbers, and arrival and departure dates.

Baggage check records include the following information for the years 1927-1953: check number, name and bag type, date checked, and date taken out. Types of baggage checked include suitcases, sea bags, trunks, and boxes. Occasional notes record the ship of the sailor. Some later baggage records include signatures of sailors.

Forty Mariner's House cashbooks record income from board, lodging, meals, and sundries, as well as expenditures for refunded board, help wages, provisions, house supplies, water, electric, laundry, telephone, postage, and sundries. Some cashbooks also include safe keeping accounts. Most cashbooks include names of lodgers and of businesses with which Mariner's House had accounts.

Comparative cash statements for Mariner's House list monthly figures for two years (for example, both January 1967 and January 1966). The statements compare figures for house receipts, house payments, and lodgings and meals furnished. Safe Keeping Funds are also included in the statements. Two volumes also include inspection visit reports.

One [Mariner's House] credit book is a chronological list of persons to whom cash was lent on credit. The records include the amount borrowed and sums repaid and occasionally record the date when the credit was settled.

The series consists of one floor plan of the fourth floor of Mariner's House, dated January 1937, by architect G. K. Downer.

One bound workbook contains steering and navigational calculations. One spiral bound notebook records notes on the weather, as well as maintenance activities and meetings at Mariner's House.