Historical queries

I am researching the history of an area of Alvechurch east of Redditch Road and south of The Holloway.

One of the features of the area is a claypit in the field behind the belt of trees bordering Redditch Road and I should like to find out what the clay was used for. 

At the meeting of the Village Society in May I learned that clay from another site was delivered to the former brickworks in Alvechurch. Does anyone know whether clay from our pit went there, or when the pit would have been worked?

Another puzzle: in the northern half of the belt of trees there is a row of nine very tall Wellingtonia pines.

Does anyone know how they came to be there? Or why that belt of trees exists between the road and the field behind it?

Any information on those queries would be much appreciated.

Peter Gatenby
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