Hi
I think an ag lab was a skilled farm labourer who was given a cottage to live in by the farmer in return for work. I think an ag lab did a lot of digging ditches, helping plough fields, and other skilled, but probably back breaking work.
Servants were people who were hired at a house by a family, ie, helping keep the house, cook, wash, and all sorts. Male servants were butlers, footmen, coachmen and gardeners mainly.
Here is a story as my family have Sussex blood.
My ggggran Mary Ann Walder born in 1839 was the daughter of a successful wheelwright in the Slaugham area of Sussex. She gave birth to an illegitimate baby daughter in December 1863 in Warninglid, Sussex. The father, Thomas Roberts lived a few miles away in Brighton. He was a 50-year old servant and footman. I think that could be how they met. When Mary Ann Walder fell pregnant in about April 1863, Thomas was still married, but his wife was very ill with TB. The previous wife died on 14 Nov 1863 in Brighton.
Inbetween Feb and June 1864, Thos and Mary Ann both moved to London and Thos gt a job as a servant in Stoke Newington. I believe their behaviour caused a scandal back in Warninglid and that could explain their sudden departure from Sussex.
Ben