Consists of correspondence and documents of the Gulick family of Middlesex and Somerset counties, New Jersey. The collection contains some personal family correspondence and documents, especially of William Gulick, but consists mainly of material regarding the running of stagecoach lines of those counties, including the Columbia Coach Co., Federal Coach Lines, and the New Union Line. The correspondence deals with such subjects as the care of horses, repair to coaches, stables, extra loads, and steamboat connections. The documents include bills, receipts, wills, a genealogy, bonds, deeds, mortgages, bills of sale, arrest warrants, an insurance policy, a promissory note, general statements of account, and a certificate of stock shares.

The following standard abbreviations, or their variations, are used to identify materials in this collection: ALS = autograph letter signed, TLS = typed letter signed, ACS = autograph card signed, TCS = typed card signed, ANS = autograph note signed, TNS = typed note signed, AMsS = autograph manuscript signed, and TMsS = typed manuscript signed.