A few more notes.

Bailiff's Daughter
This appears in Ritson (1783) though it is earlier. From Morley "A Bundle of Ballads":

"The Bailiff's Daughter of Islington," or "True Love Requited," is a ballad in Pepys's collection, now in the Bodleian. The Islington of the Ballad is supposed to be an Islington in Norfolk.

Suggesting that my clue is a bit of a red herring really (I'd always wondered why it took her 7 years to travel from Islington to London (a distance of about a mile).

Cruel Sister (Berkshire Tragedy)

There's a site about the song here.

Lesley's Contemplator site says:
This ballad is also known as Binorrie. This version is, of course, from Berkshire. There is a similar version from Lancashire. The earliest known version of the ballad The Miller and the King's Daughter appeared on a broadside in 1656. This ballad is not related to The Berkshire Tragedy (see link below to a graphic of a broadside of that ballad). This ballad is a variation of Child Ballad #10 (The Twa Sisters). Variants and alternate titles include: The Cruel Sister, The Bonnie Milldams of Binnorie, The Bonny Bows o' London and Sister, Dear Sister. The ballad also appears in Scandinavia.

Derby Ram

There's some useful information about the song here.

According to Roy Palmer, this song (No. 145 in his collection) was usually sung on New Year's Eve and "was already commonplace by 1739, when the vicar of St. Allemund's Church, Derby, wrote at the end of a letter to his son, "And thus I conclude this long story; almost as long a tale as that of the Derby Ram," Everyman's Book of English
Country Songs, 237. [Note by Bob Hudson.]

:-)