The Celtic World (Routledge Worlds)

N 0'\ 0

Table

15.1

Logboats

from

Southern

Britain

dated

AD

600

or

earlier

Logboat

Date

range

Region

Sized

Be

cal.

(m)

Appleby

1525-

120

5

Humber!

Ancholme

>7.5

x

1.35

Short

Ferry

12

55-

80

5

Wash/Witham

>7.3

x

0.85

Brigg

I

1245-800

Humber!

Ancholme

14.78

x

1.37

x

I

Peterborough

875-53

0

Wash/Nene

>9.8

x

0.78

Hasholme

a

750-39

0

Humber!Foulness

12.78

x

1.4

x

1.25

Ellesmere

46

5-

200

Severn/Parry

3.35

x

0·73

x

0·44

Clifton

I

450-

195

HumberlTrent

8.55

x

0.76

x

0.36

Clifton

2

41

5-95

HumberlTrent

9.25

x

0.76

x

0.38

Poole

(^14)

0-

19

0

Poole

Harbour

10.01

x

1.52

x

0.5

Holme

Pierrepont

I

41

0-

135

Humber!Trent

>6,5

x

0.86

Holme

Pierrepont

2 b

Humber/Trent

>5.3

x

0.82

Holme

Pierrepont

3 b

Humber/Trent

>10.0

x

1.28

Shapwick

c

795-

80

Brue

>6

x

0.75

Glastonbury

I

340-3

0

Brue

5.4

x

0.69

x

0.42

Woolwich

205-105

AD

Thames

>4·75

x

0·55

Baddiley

Mere

100-110

AD

MerseylWeaver

5.49

x

0.92

x

0.61

Wisley

II0-345

AD

Thames/Wey

>3.66

x

0.7

Notes a

Dated

by

dendrochronology

(Sheffield)

to

322-277

Be

(Millett

and

McGrail

1987:

79-84).

Undated

but

considered

contemporary

with

HPI.

Deadweight

e

coefficient 0.67 0·57 0.67 0·43 0·47 0·57 0.60 0.66

Volumetric! coefficient

(x

10

3 )

1.54 3.

00

11.3 1.9 1.7 1.94 4.

6

14.

8

c

The

one

date

for

this

boat

(Q-357)

has

a high

uncertainty

(±120),

hence

the

large

date

range.

It

is possible

that

this

boat

has

a similar

date

to

Glastonbury

I.

d

Sizes

are

given

as

length

x max.

breadth

x max.

height

of

hull,

for

those

boats

which

have

been

theoretically

reconstructed.

For

the

others,

with

less

remains,

a minimum

length

and

breadth

are

given.

e

Deadweight

coefficient

=

weight

of

crew

and

cargo/displacement

at

standard

draft

(60%

height

of

sides).

The

greater

this

coefficient,

the

better

the

boat

is

for

carrying

high

density

loads

(McGrail

197

8 : 137).

Volumetric

coefficient

=

displacement/cube

of

waterline

length

(when

carrying

maximum

crew

and

no

cargo).

A

value

""'2

X

10-

3 indicates

a hull

of

potentially

high

speed.

Sources

Dates:

Switsur,

R.V.

(1990)

Results

of

Boat

Dating

Programme,

Cambridge

(unpublished).

The

dates

have

been

calibrated

using

the

curves

published

by

Pearson

and

Stuiver

(1986).

The

felling

dates

of

the

parent

logs

of

these

boats

(close

to

the

building

date)

could

be

an

estimated

25

to

70

years

later

than

the

calibrated

dates

given

above.

Other

data:

McGrail,

S.

(1978)

Logboats

of

England

and

Wales,

Oxford:

British

Archaeological

Reports

p.