Valerie,
The information came from several sources. The information about Ocklynge came from personal knowledge (I grew up in Eastbourne and have many relatives buried there). The information from the Kelly's directory came from a CD that I have and the information regarding his attendance at Cambridge came from a major subscription website.
Here's a bit more information. In Mar Q 1884, Jeannie Josephine D'E Burns married Alfred Gibson Jalland in Chorlton District, Lancashire. I assume that Jeannie Josephine was your grandmother's sister.
Alfred Gibson Jalland was admitted to Sidney College, Cambridge in October 1879, matriculated (was formally admitted to the University) in Michelmas term 1879 and migrated to Downing College on Jan 25 1883.
In 1861, Alfred G Jalland was age 7 months and living with his family at Castle Gate, Nottingham.
RG9/2468/59/11
Robert Jalland; Head; age 60; Architect and Lawyer; b Nottingham
Mary Jalland; Wife; age 30; b Carleton Le Moorland, Lincs
Catherine C Jalland; Daughter; age 10; b Nottingham
Albert G Jalland; Son; age 7 months; b Nottingham
Elizabeth Worlridge; Servant; age 17; General Servant; b Arnold, Notts
Robert Jalland was born in abt 1801 in Nottingham.
I think that this was the marriage of his grandparents:
Upton, Notts
Robert Jalland, p. Rolleston, and Elizabeth Gibson, lic. 07 Jul 1762
The licence is:
06 Jul 1762 Robert Jalland, of Rolleston, farmer, aged above 31, bach., & Elizabeth Gibson, of Upton, spr., aged above 28; at Upton.
There is an Ancestry World Tree entry for Robert Jalland that gives his ancestors. Roberts first wife was Jane Doyle and his second wife was Mary Carr.
The mention of Herbert St in London was interesting, since in 1881, Jeannie Burns was living at 2 Herbert St, London with her parents Edward and Margaret and brother Edward. However, Jeannie was only 10 at that time which would mean that she was only 14 when she married Alfred. Something doesn't seem correct there. This may just be a coincidence.
If you provide some details of your grandmother (name, date and place of birth), I may be able to find some more information.
Best Wishes
Mark