Early Life
I have found no parish records for his baptism, which would have been around 1750
1. There is, however, a baptismal record for an
Isaac Lowthen, on the 14 Dec 1749, in Hesket, Cumberland. This Isaac had parents noted as
Thomas Lowthen and
Jane (surname not given). Hesket is quite far south of Carlisle (though the NE parts aren't too far from Newbiggin, see below).
However Hesket pops up again in the Bell family (see
Isaac Bell). So for now I'm going to stop here, but leave this as a future clue to investigate.
Career & Family Life
Isaac Lowthian married
Mary Bond at St Cuthbert's in Carlisle on the 28
th of May 1780. They had at least four children:
- Thomas, b. 1781
- John, b. 1782
- Isaac, b. 1784
- Catherine, b. 1788 and who married Thomas Bell of Carlisle
A land tax redemption from 1800 (just before he died) puts
Isaac in Brisco, south east of Carlisle. The baptismal record of his daughter
Catherine is in Carlisle itself, which is also where
Isaac married
Mary Bond. So the evidence suggests these Lowthians were based in, or close to, Carlisle. Trying to narrow the location down further, we can find an 1841 census record for a
Thomas Lowthian, of the right age to be
Isaac's eldest son, at Newbiggin in Brisco; it looks to me like he inherited the family home and continued to live there. On the same census there's an entry for a Mary Lowthian, aged 87, who was probably
Mary Bond, i.e.
Isaac's wife.
Aside: Newbiggin
There was a house called Newbiggin Hall, in Brisco, just south of Carleton. The current location appears to be
this house, when cross-referenced with an
old OS map from 1861 (see bottom left corner). On that same old map, near Newbiggin Hall, you can also see Carleton House and Newbiggin Quarry, as well as Quarry Gate. All these locations are also mentioned on the same page of the 1841 census. Note, however, that the Lowthians appeared not to live in Newbiggin Hall itself (which was occupied by the Clarke family, according to the 1841 census, but a nearby location called Newbiggen. This isn't totally obvious on the 1841 census but becomes clearer in the 1851 census (
Thomas had died, but Elizabeth remained with her children Maria, Thomas and Isaac).
Most likely is that there was a farm on the Newbiggin Hall estate, which was run by the Lowthians.
The Tithe records from Brisco St Cuthberts in 1839 show the land around Newbiggen Hall belonging (and occupied) to both Thomas Lowthian (son of Isaac of this page) and to Henry Aglionby Esq. The division seems to have been that Thomas owned the land to the west of the hall, whilst Henry owned the land to the east. Overall across the entire parish Henry Aglionby was by far the bigger landowner. The latter appears to have been a Whig barrister
Death
Isaac Lowthian died in March 1800 and was buried on the 17
th at St Cuthbert.
Note Bene
There is a different Isaac Lowthian, also from Cumberland (but Renwick, rather than Carlisle) who married a Mary Wells. Many online trees mix up these two people. Another mistake I've also seen in a few write-ups is that they put the Lowthians as residents of Newbiggin Hall itself, which I think is doubtful given the census data described above.
Footnotes
[1] His marriage licence (dated 1780) gives his age as 30
Abt 1750 - Abt 1800 (~ 50 years)
[2] 
