I came across the following in the National Archives records for
Chetham's Library: Belle Vue Zoological Gardens [F.4.4 - F.6.9]

(see http://www.nationalarchives.gov.uk/a2a/records.aspx?cat=418-f41f69_2&cid=-1)

Draft manuscript, interleaved with typing paper, faded, creased edges F.4.4.7.v 19thc-20thc

Insertion: Poem, printed c.1866 GEO GHEGAN'S/GUIDE TO BELLE VUE GARDENS... BY J.B. GEO GHEGAN SUNG ALSO BY ALBERT DE VOY. 6 Stanzas. G. Jennison's 'Season 1866' Pencil note Date To be had wholesale of J.B. GEOGHAN, Dog Inn, Deansgate, Manchester.
Creased. Bordered. Mounted on white board.

You can find out more baout Belle Vue Zoological Gardens here: http://manchesterhistory.net/bellevue/history.html

Archival history: The Belle Vue archive has been assembled by the Library over a period of over 70 years. The group includes papers given by George Jennison, the grandson of the founder and the last of the family to own the zoo, material given by Robert Nicholls, author of Looking back at Belle Vue (1990) and The Belle Vue Story (1992), and material given by R.T. Talbot, a former Deputy General Manager at Belle Vue.

Creators Belle Vue Zoological Gardens

So Geoghegan was in Manchester in 1866