This PDF [0] has vg shots of several arrows. (See fig. 4) (I'm not surprised at straight shafts from 700CE. But F166 (fig. 4b) from 3980-3830calBP is birch (Table 1) - and surprisingly regular.)

"The Langfonne paper is open access and can be downloaded here:" ( t.co/zd5lwds8Wz points to ) =>

[0]https://journals.sagepub.com/doi/pdf/10.1177/095968362097277...

Official website: https://secretsoftheice.com/news/2020/11/25/prehistoric-arro...