Thanks for your help with this everyone.
Carole, Monica and Cookie:
What I know for sure is the following:
I have Thomas Allan and Alison Hunter Lees marriage certificate and it states only Thomas' mother's name (Barbara Allan) as parent, no father entered. They were married at St. Mary Magdalene Church, Dundee after Publication according to the Forms of the Scottish Episcopal Church. At the time of the marriage both Thomas and Alison give their adress as 51 Withies Lane, Dundee.
I know that Thomas and Alison did at one time live at 60 Annfield Lane or Road(?), Dundee. When Thomas was killed in WWI in 1915 (I have his military record) his mother Barbara was deceased and his wife, Alison's address was 60 Annfield Road, Dundee.
When Thomas & Alison's daughter Janet Allan married in 1916 to George Easton they both give their address as 60 Annfield Road (I have their marriage certificate as well). Janet and George had two kids in Scotland (my grandfather being the first) born at 60 Annfield Road, Dundee (according to my grandfather's birth certificate which I have).
In 1876 Dundee East Poorhouse Register I found Barbara Allan, age 33, and her two children, Mary Allan 57 months and her son, Thomas Allan, Age 4 months , admission date 15 June 1876.
On the 1881 Census there is a Barbara Allan age 38 and her son Thomas Allan age 5 (no Mary) living as boarders at 4 James St. Dundee (thanks to your help) I was unable to locate Mary Allan in 1881.
Next I have in 1891 Thomas Allan, age 15, living with Aunt Agnes Allan, age 40, at 60 Annfield Road, St. Peter, Liff & Benvie.
If Barbara and Mary Allan are showing up on the 1891 Poorhouse Index living at 29 Tay St. could it be that they are living together and Thomas went for some reason to live with his Aunt? This Barbara and Mary are the right ages to m ine. Is there any way of finding any further information on people registering in the Poorhouse? Like birthplaces, etc?
In 1901 Agnes Allan and nephew Thomas Allan are still living at 60 Annfield Road, but there is no Alison. I know that my great grandmother was born in Edinburgh and I believe that Alison went to Edinburgh to her mother's to have her baby. My greatgrandmother was born in 1894.
What is really confusing is the Thomas Allan, wife Alison with two kids John and Isabella living at 91 Cumberland St. in Glasgow in 1901. The family names are all the same as mine but the age groups are a year or two off as are the birthplaces of Thomas and Alison which are not the same as on other censuses. Also Thomas could not have been on two censuses at once I would think.
I think I have hit a brick wall again!! I don't know anything about Barbara Allan and her family.
I really want to thank all of you for your help in trying to find this family. This has been my brick wall for almost 20 years and I only just found out what information I have only this past month or so. My sister went to Scotland in 1981 to visit Thomas and Alison's daughter, Mary Allan Lorimer, and gathered my great grandmother (Mary's sister), Janet's siblings names at that time.