Late 1960s (1969) and 1970s would have been Penn Central.
From the Arranged Freight Service Symbol Book No. 20 dated October 31, 1965 the following trains were "scheduled":
BO-1, Boston to Maybrook, Daily, departed Cedar Hill 3:10 a.m., arrived Maybrook 7:30 a.m., C-425s and U-25Bs for motive power.
A/CB-1, Boston to Maybrook, Daily except Sunday, departed Cedar Hill 9:35 p.m., arrived Maybrook 1:35 a.m., C-425s and U-25Bs for motive power.
CB-1, Cedar Hill to Maybrook, Daily, departed Cedar Hill 10:00 p.m., arrived Maybrook 2:00 a.m., C-425s and U-25Bs for motive power.
CB-2, Maybrook to Cedar Hill (and Boston), Daily, departed Maybrook 2:30 a.m., arrived New Haven 6:10 a.m., C-425s and U-25Bs for motive power, Monday thru Friday stopped at New Haven Union Station, Saturday and Sunday entered Cedar Hill Yard.
NO-1, Cedar Hill to Maybrook, Daily, departed Cedar Hill 10:30 a.m., arrived Maybrook 3:20 p.m., C-425s and U-25Bs for motive power.
NO-3, Cedar Hill to Maybrook, Daily, departed Cedar Hill 10:10 p.m., arrived Maybrook 4:55 a.m., anything other than C-425s or U-25Bs for motive power (RS-3s, GP-9s, H-16-44s, RS-11s).
NO-5, Cedar Hill to Maybrook, Sunday only, departed Cedar Hill 3:30 p.m., arrived Maybrook 8:20 p.m., anything other than C-425s or U-25Bs for motive power (RS-3s, GP-9s, H-16-44s, RS-11s).
NO-9, Cedar Hill to Maybrook, Daily, departed Cedar Hill 12:30 p.m., arrived Maybrook 6:30 p.m., C-425s and U-25Bs for motive power.
A/OB-2, Maybrook to Cedar Hill, Daily, departed Maybrook 1:00 p.m., arrived Cedar Hill 5:30 p.m., anything other than C-425s or U-25Bs for motive power (RS-3s, GP-9s, H-16-44s, RS-11s).
OB-2, Maybrook to Boston, Daily, departed Maybrook 2:00 p.m., arrived Cedar Hill 6:30 p.m., C-425s and U-25Bs for motive power.
OB-4, Maybrook to Cedar Hill (and Boston), Daily, departed Maybrook 5:00 p.m., arrived Cedar Hill 11:00 p.m., C-425s and U-25Bs for motive power.
OB-6, Maybrook to Cedar Hill, Daily, departed Maybrook 6:15 a.m., arrived Cedar Hill 10:45 a.m., C-425s and U-25Bs for motive power.
ON-6, Maybrook to Cedar Hill, Daily, departed Maybrook 9:30 p.m., arrived Cedar Hill 6:05 a.m., C-425s and U-25Bs for motive power.
NX-8, Poughkeepsie, Daily except Sunday, operated east to Hopewell Junction, Beacon Branch, Mattewawan, Glenham and Beacon, operated west to Clintondale and Modena. Monday-Wednesday-Friday operated east to Green Haven and Holmes.
NX-9, Poughkeepsie (Yard Switcher), Daily except Sunday, operated to Highland.
NX-10, Danbury, Daily except Sunday, operated east to Newtown, Botsford and Stevenson, operated west to Brewster.
NX-14, Danbury, Daily except Sunday, operated to Newtown and Brewster as required.
No locals out of Maybrook or Hopewell Junction.
Ex-NYNH&H SS Opr