Stevenson family in Lincs

[Terry]

Hi , I am looking for any information please on the following family found in the 1881 census as follows:-

Address:- Coast Guards Skidbrook, Lincoln,
Ref RG11/3265 Folio 140 Page 10

John STEVENSON Head M 37 M Coast Guard Devonport, Devon,

Mary A. STEVENSON Wife M33 M Plymouth, Devon,
John B. STEVENSON Son 13 M Scholar Plymouth, Devon,
Benjamin J. STEVENSON Son 9 M Scholar Plymouth, Devon,
Mary A. STEVENSON Daur 7 F Scholar Fosdyke, Lincoln,
Christiana STEVENSON Daur 5 F Scholar Fosdyke, Lincoln,
George STEVENSON Son 4 M Scholar Fosdyke, Lincoln,
Margaret STEVENSON Daur 2 F Fosdyke, Lincoln,
Alfred STEVENSON Son 6 m M Saltfleet, Lincoln

I have found them in Plymouth in the 1871 census and by the 1891 census it looks as if John has died and most of the family are back in Plymouth:-

RG11/……… Folio 94 Page 45 Sched. 379
9 Carlton Terrace, Plymouth

STEVENSON Mary A Head W F 40 y Housekeeper Plymouth
STEVENSON Christiana Dau - F 14 y Scholar LIN -
STEVENSON George Son - M 13 y Scholar LIN -
STEVENSON Margaret Dau - F 12 y Scholar LIN -
STEVENSON Alfred Son - M 10 y Scholar LIN -
STEVENSON Joseph Son - M 8 y Scholar LIN -
STEVENSON Frederick Son - M 6 y Scholar LIN -
STEVENSON Amy Dau - F 4 y Scholar LIN -

By the year of birth of the youngest child it looks as if they were still in Lincs in 1886/7.

Any information please- possibly Roman Catholic connections. John's death would be great, also any info on the children missing in the 1891 census in Plymouth.